diff --git a/Cargo.toml b/Cargo.toml
index d76b5c9a..b783733c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,11 @@ edition = "2021"
 default-run = "runty8"
 readme = "README.md"
 
+[workspace]
+members = ["runty8-graphics"]
+
 [dependencies]
 glium = "*"
 itertools = "*"
 rand = "*"
+runty8-graphics = { path = "./runty8-graphics" }
diff --git a/examples/celeste/main.rs b/examples/celeste/main.rs
index b27336aa..259f71b6 100644
--- a/examples/celeste/main.rs
+++ b/examples/celeste/main.rs
@@ -1,5 +1,4 @@
 use std::f32::consts::{FRAC_1_SQRT_2, PI};
-use std::path::Path;
 
 use rand::Rng;
 use runty8::{App, Button, Pico8};
diff --git a/examples/circles/main.rs b/examples/circles/main.rs
new file mode 100644
index 00000000..e95f248a
--- /dev/null
+++ b/examples/circles/main.rs
@@ -0,0 +1,36 @@
+use runty8::{self, App, Button, Pico8};
+
+fn main() {
+    runty8::run_app::<Circles>("examples/circles".to_owned()).unwrap();
+}
+
+struct Circles {}
+impl Circles {
+    fn do_draw(&self, pico8: &mut Pico8) {
+        pico8.cls(0);
+
+        pico8.rect(0, 0, 127, 127, 7);
+        for i in 0..=7 {
+            pico8.circ(5 + i * 15, 64, i, 7);
+            pico8.circfill(5 + i * 15, 84, i, 7);
+            pico8.pset(5 + i * 15, 64, 9);
+        }
+    }
+}
+
+impl App for Circles {
+    fn init(pico8: &mut Pico8) -> Self {
+        let this = Self {};
+
+        this.do_draw(pico8);
+        this
+    }
+
+    fn update(&mut self, pico8: &mut Pico8) {
+        if pico8.btnp(Button::C) {
+            self.do_draw(pico8);
+        }
+    }
+
+    fn draw(&mut self, _: &mut Pico8) {}
+}
diff --git a/examples/shapes/main.rs b/examples/shapes/main.rs
new file mode 100644
index 00000000..7c8120f1
--- /dev/null
+++ b/examples/shapes/main.rs
@@ -0,0 +1,53 @@
+use rand::Rng;
+use runty8::{self, App, Button, Pico8};
+
+fn main() {
+    runty8::run_app::<Circles>("examples/circles".to_owned()).unwrap();
+}
+
+struct Circles {}
+impl Circles {
+    fn do_draw(&self, pico8: &mut Pico8) {
+        pico8.cls(0);
+
+        pico8.rect(0, 0, 127, 127, 7);
+
+        fn rand(n: i32) -> i32 {
+            rand::thread_rng().gen_range(0..n)
+        }
+
+        for _ in 0..=7 {
+            pico8.rectfill(
+                rand(128),
+                rand(128),
+                rand(128),
+                rand(128),
+                rand::thread_rng().gen_range(9..16),
+            );
+            pico8.rect(
+                rand(128),
+                rand(128),
+                rand(128),
+                rand(128),
+                rand::thread_rng().gen_range(1..8),
+            );
+        }
+    }
+}
+
+impl App for Circles {
+    fn init(pico8: &mut Pico8) -> Self {
+        let this = Self {};
+
+        this.do_draw(pico8);
+        this
+    }
+
+    fn update(&mut self, pico8: &mut Pico8) {
+        if pico8.btnp(Button::C) {
+            self.do_draw(pico8);
+        }
+    }
+
+    fn draw(&mut self, _: &mut Pico8) {}
+}
diff --git a/examples/sprites/main.rs b/examples/sprites/main.rs
new file mode 100644
index 00000000..bbc179b8
--- /dev/null
+++ b/examples/sprites/main.rs
@@ -0,0 +1,56 @@
+use runty8::{self, App, Button, Pico8};
+
+fn main() {
+    runty8::run_app::<Sprites>("examples/sprites".to_owned()).unwrap();
+}
+
+struct Sprites {}
+impl Sprites {
+    fn do_draw(&self, pico8: &mut Pico8) {
+        pico8.cls(0);
+
+        for i in 0..(128 / 8) {
+            pico8.line(0, i * 8, 127, i * 8, if i % 2 == 0 { 7 } else { 5 });
+            pico8.line(i * 8, 0, i * 8, 127, if i % 2 == 0 { 6 } else { 13 });
+        }
+
+        pico8.spr_(32, 32, 32, 0.5, 0.5, false, false);
+        pico8.spr_(32, 40, 40, 1.0, 1.0, false, false);
+
+        // TEST FLIPS
+        const RIGHT_ARROW: usize = 1;
+        const UP_ARROW: usize = 2;
+        const UP_RIGHT_ARROW: usize = 3;
+
+        pico8.spr_(RIGHT_ARROW, 48, 48, 1.0, 1.0, false, false);
+        pico8.spr_(RIGHT_ARROW, 48, 64, 1.0, 1.0, true, false);
+        pico8.spr_(UP_ARROW, 48, 80, 1.0, 1.0, false, false);
+        pico8.spr_(UP_ARROW, 48, 96, 1.0, 1.0, false, true);
+
+        pico8.spr_(UP_RIGHT_ARROW, 80, 48, 1.0, 1.0, false, false);
+        pico8.spr_(UP_RIGHT_ARROW, 80, 64, 1.0, 1.0, true, false);
+        pico8.spr_(UP_RIGHT_ARROW, 80, 80, 1.0, 1.0, false, true);
+        pico8.spr_(UP_RIGHT_ARROW, 80, 96, 1.0, 1.0, true, true);
+
+        // TEST BIG SPRITES
+        pico8.print("BIG SPRITE", 16, 8, 7);
+        pico8.spr_(7, 16, 16, 2.0, 2.0, false, false);
+    }
+}
+
+impl App for Sprites {
+    fn init(pico8: &mut Pico8) -> Self {
+        let this = Self {};
+
+        this.do_draw(pico8);
+        this
+    }
+
+    fn update(&mut self, pico8: &mut Pico8) {
+        if pico8.btnp(Button::C) {
+            self.do_draw(pico8);
+        }
+    }
+
+    fn draw(&mut self, _: &mut Pico8) {}
+}
diff --git a/examples/sprites/map.ppm b/examples/sprites/map.ppm
new file mode 100644
index 00000000..681d053b
--- /dev/null
+++ b/examples/sprites/map.ppm
@@ -0,0 +1,4 @@
+P3
+1024 512
+255
+ 0 0 0  0 0 0  0 0 0  255 236 39  255 236 39  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  255 236 39  255 236 39  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  255 236 39  255 236 39  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 0 0  0 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\ No newline at end of file
diff --git a/examples/sprites/map.txt b/examples/sprites/map.txt
new file mode 100644
index 00000000..5f1e1ab4
--- /dev/null
+++ b/examples/sprites/map.txt
@@ -0,0 +1,64 @@
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\ No newline at end of file
diff --git a/examples/sprites/sprite_flags.txt b/examples/sprites/sprite_flags.txt
new file mode 100644
index 00000000..972fad3a
--- /dev/null
+++ b/examples/sprites/sprite_flags.txt
@@ -0,0 +1,256 @@
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\ No newline at end of file
diff --git a/examples/sprites/sprite_sheet.ppm b/examples/sprites/sprite_sheet.ppm
new file mode 100644
index 00000000..6235cd70
--- /dev/null
+++ b/examples/sprites/sprite_sheet.ppm
@@ -0,0 +1,4 @@
+P3
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diff --git a/examples/sprites/sprite_sheet.txt b/examples/sprites/sprite_sheet.txt
new file mode 100644
index 00000000..3b599e02
--- /dev/null
+++ b/examples/sprites/sprite_sheet.txt
@@ -0,0 +1,128 @@
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diff --git a/runty8-graphics/Cargo.toml b/runty8-graphics/Cargo.toml
new file mode 100644
index 00000000..cd1fd41d
--- /dev/null
+++ b/runty8-graphics/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "runty8-graphics"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/runty8-graphics/src/circle.rs b/runty8-graphics/src/circle.rs
new file mode 100644
index 00000000..438bdee2
--- /dev/null
+++ b/runty8-graphics/src/circle.rs
@@ -0,0 +1,117 @@
+use crate::line::horizontal_line;
+use crate::Graphics;
+
+/// Iterator over points in the circumference of a circle.
+pub fn circle(cx: i32, cy: i32, r: u32) -> impl Graphics {
+    northwest_octant(r)
+        .flat_map(|(x, y)| {
+            [
+                (x, y),
+                (x, -y),
+                (-x, y),
+                (-x, -y),
+                (y, x),
+                (y, -x),
+                (-y, x),
+                (-y, -x),
+            ]
+            .into_iter()
+        })
+        .map(move |(x, y)| (cx + x, cy + y))
+}
+
+/// Iterator over points of a circle (both circumference and interior).
+pub fn filled_circle(cx: i32, cy: i32, r: u32) -> impl Graphics {
+    northwest_octant(r)
+        .flat_map(|(x, y)| [(x, y), (y, x)]) // Generate a quadrant, instead of an octant
+        .flat_map(|(x, y)| horizontal_line(-x, x, y).chain(horizontal_line(-x, x, -y)))
+        .map(move |(x, y)| (cx + x, cy + y))
+}
+
+struct NorthwestOctant {
+    x: i32,
+    y: i32,
+    d: i32,
+}
+
+impl NorthwestOctant {
+    fn new(r: i32) -> Self {
+        Self {
+            x: 0,
+            y: r,
+            d: 1 - r,
+        }
+    }
+}
+
+// Taken from Pemsa, a C++ implementation of pico8.
+// This looks similar to Bresenham's circle drawing algorithm.
+//
+// See: https://github.com/egordorichev/pemsa/blob/master/src/pemsa/graphics/pemsa_graphics_api.cpp#L393
+impl Iterator for NorthwestOctant {
+    type Item = (i32, i32);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.y < self.x {
+            return None;
+        }
+        let ret_value = (self.x, self.y);
+
+        self.x += 1;
+        if self.d < 0 {
+            self.d += 2 * self.x + 1;
+        } else {
+            self.y -= 1;
+            self.d += 2 * (self.x - self.y) + 1;
+        }
+
+        Some(ret_value)
+    }
+}
+
+fn northwest_octant(r: u32) -> impl Graphics {
+    NorthwestOctant::new(
+        r.try_into()
+            .expect(&format!("Couldn't convert radius {} to i32", r)),
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // Examples compiled from looking at Pico8's circ output.
+    #[test]
+    fn radius_0_northwest_octant() {
+        assert_eq!(northwest_octant(0).collect::<Vec<_>>(), vec![(0, 0)]);
+    }
+
+    #[test]
+    fn radius_1_northwest_octant() {
+        assert_eq!(northwest_octant(1).collect::<Vec<_>>(), vec![(0, 1)]);
+    }
+
+    #[test]
+    fn radius_2_northwest_octant() {
+        assert_eq!(
+            northwest_octant(2).collect::<Vec<_>>(),
+            vec![(0, 2), (1, 2)]
+        );
+    }
+
+    #[test]
+    fn radius_3_northwest_octant() {
+        assert_eq!(
+            northwest_octant(3).collect::<Vec<_>>(),
+            vec![(0, 3), (1, 3), (2, 2)]
+        );
+    }
+
+    #[test]
+    fn radius_4_northwest_octant() {
+        assert_eq!(
+            northwest_octant(4).collect::<Vec<_>>(),
+            vec![(0, 4), (1, 4), (2, 3), (3, 3)]
+        );
+    }
+}
diff --git a/runty8-graphics/src/lib.rs b/runty8-graphics/src/lib.rs
new file mode 100644
index 00000000..426cb319
--- /dev/null
+++ b/runty8-graphics/src/lib.rs
@@ -0,0 +1,48 @@
+mod circle;
+mod line;
+mod rectangle;
+
+pub use circle::{circle, filled_circle};
+pub use line::line;
+pub use rectangle::Rectangle;
+
+/// An alias for `Iterator<Item = (i32, i32)>`.
+pub trait Graphics: Iterator<Item = (i32, i32)> {}
+
+impl<Type: Iterator<Item = (i32, i32)>> Graphics for Type {}
+
+/// Conditionally reversed iterator.
+pub struct MaybeReverse<I> {
+    iter: I,
+    reverse: bool,
+}
+
+/// Extension trait to conditionally reverse iterators.
+pub trait ReverseIf
+where
+    Self: Sized,
+{
+    fn reverse_if(self, reverse: bool) -> MaybeReverse<Self>;
+}
+
+impl<T: DoubleEndedIterator> ReverseIf for T {
+    /// Conditionally reverse an iterator.
+    fn reverse_if(self, reverse: bool) -> MaybeReverse<Self> {
+        MaybeReverse {
+            iter: self,
+            reverse,
+        }
+    }
+}
+
+impl<I: DoubleEndedIterator> Iterator for MaybeReverse<I> {
+    type Item = I::Item;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.reverse {
+            self.iter.next_back()
+        } else {
+            self.iter.next()
+        }
+    }
+}
diff --git a/src/draw.rs b/runty8-graphics/src/line.rs
similarity index 57%
rename from src/draw.rs
rename to runty8-graphics/src/line.rs
index 0f42ff44..617d66ac 100644
--- a/src/draw.rs
+++ b/runty8-graphics/src/line.rs
@@ -1,8 +1,11 @@
-pub fn line(x0: i32, y0: i32, x1: i32, y1: i32) -> LineIter {
+use crate::Graphics;
+
+/// Iterator over the points of a line (includes endpoints).
+pub fn line(x0: i32, y0: i32, x1: i32, y1: i32) -> impl Graphics {
     LineIter::new(x0, y0, x1, y1)
 }
 
-pub struct LineIter {
+struct LineIter {
     x0: i32,
     y0: i32,
     x1: i32,
@@ -68,3 +71,41 @@ impl Iterator for LineIter {
         Some(ret)
     }
 }
+
+pub fn horizontal_line(x0: i32, x1: i32, y: i32) -> impl DoubleEndedIterator<Item = (i32, i32)> {
+    (x0..=x1).map(move |x| (x, y))
+}
+
+pub fn vertical_line(x: i32, y0: i32, y1: i32) -> impl Graphics {
+    (y0..=y1).map(move |y| (x, y))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn line_is_horizontal() {
+        assert_eq!(
+            line(20, 0, 30, 0).collect::<Vec<_>>(),
+            horizontal_line(20, 30, 0).collect::<Vec<_>>()
+        );
+    }
+
+    #[test]
+    fn line_is_vertical() {
+        assert_eq!(
+            line(0, 20, 0, 30).collect::<Vec<_>>(),
+            vertical_line(0, 20, 30).collect::<Vec<_>>()
+        );
+    }
+
+    #[test]
+    fn line_is_diagonal() {
+        assert_eq!(
+            line(2, 2, 5, 5).collect::<Vec<_>>(),
+            vec![(2, 2), (3, 3), (4, 4), (5, 5)]
+        )
+    }
+    // TODO: Test cases with inverted params (x1 > x0, etc)
+}
diff --git a/runty8-graphics/src/rectangle.rs b/runty8-graphics/src/rectangle.rs
new file mode 100644
index 00000000..1eaea1f3
--- /dev/null
+++ b/runty8-graphics/src/rectangle.rs
@@ -0,0 +1,136 @@
+use crate::line::{horizontal_line, vertical_line};
+use crate::Graphics;
+
+/// Iterate over rectangle surface/interior.
+#[derive(Clone, Copy, Debug)]
+pub struct Rectangle {
+    x: i32,
+    y: i32,
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    pub fn new(x: i32, y: i32, width: u32, height: u32) -> Self {
+        Self {
+            x,
+            y,
+            width,
+            height,
+        }
+    }
+
+    /// Iterator over the points of the surface of a rectangle.
+    /// Iteration order is unspecified.
+    pub fn surface(self) -> impl Graphics {
+        let width: i32 = self
+            .width
+            .try_into()
+            .expect(&format!("Couldn't convert width {} to i32", self.width));
+
+        let height: i32 = self
+            .height
+            .try_into()
+            .expect(&format!("Couldn't convert height {} to i32", self.height));
+
+        let top_bottom = [
+            horizontal_line(self.x, self.x + width - 1, self.y),
+            horizontal_line(self.x, self.x + width - 1, self.y + height - 1),
+        ]
+        .into_iter()
+        .flatten();
+
+        let left_right = [
+            vertical_line(self.x, self.y + 1, self.y + height - 2),
+            vertical_line(self.x + width - 1, self.y + 1, self.y + height - 2),
+        ]
+        .into_iter()
+        .flatten();
+
+        top_bottom.chain(left_right)
+    }
+
+    /// Iterator over the horizontal lines of the rectangle.
+    /// Includes surface and interior.
+    pub fn horizontal_lines(
+        self,
+    ) -> impl DoubleEndedIterator<Item = impl DoubleEndedIterator<Item = (i32, i32)>> {
+        let x0 = self.x;
+        let x1 = self.x + self.width as i32 - 1;
+
+        (self.y..self.y + self.height as i32).map(move |y| horizontal_line(x0, x1, y))
+    }
+}
+
+/// Iterator over the points of a rectangle (interior and border).
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn empty_rectangle() {
+        assert_eq!(Rectangle::new(34, 22, 0, 0).surface().count(), 0);
+    }
+
+    #[test]
+    fn small_rectangle_count() {
+        assert_eq!(Rectangle::new(8, 4, 5, 3).surface().count(), 12);
+    }
+
+    #[test]
+    fn small_rectangle() {
+        assert_eq!(
+            Rectangle::new(8, 4, 5, 3).surface().collect::<Vec<_>>(),
+            vec![
+                (8, 4), // Top
+                (9, 4),
+                (10, 4),
+                (11, 4),
+                (12, 4),
+                (8, 6), // Bottom
+                (9, 6),
+                (10, 6),
+                (11, 6),
+                (12, 6),
+                (8, 5),  // Left
+                (12, 5), // Rigth
+            ]
+        );
+    }
+
+    #[test]
+    fn empty_filled_rectangle() {
+        assert_eq!(
+            Rectangle::new(34, 22, 0, 0)
+                .horizontal_lines()
+                .flatten()
+                .count(),
+            0
+        );
+    }
+
+    #[test]
+    fn small_filled_rectangle_count() {
+        assert_eq!(
+            Rectangle::new(8, 4, 2, 3)
+                .horizontal_lines()
+                .flatten()
+                .count(),
+            6
+        );
+    }
+
+    #[test]
+    fn small_filled_rectangle() {
+        let mut filled_rectangle = Rectangle::new(8, 4, 2, 3).horizontal_lines().flatten();
+
+        assert_eq!(filled_rectangle.next(), Some((8, 4)));
+        assert_eq!(filled_rectangle.next(), Some((9, 4)));
+        assert_eq!(filled_rectangle.next(), Some((8, 5)));
+        assert_eq!(filled_rectangle.next(), Some((9, 5)));
+        assert_eq!(filled_rectangle.next(), Some((8, 6)));
+        assert_eq!(filled_rectangle.next(), Some((9, 6)));
+        assert_eq!(filled_rectangle.next(), None);
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index d1819ce2..ba4b2b34 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,13 +8,12 @@ pub mod ui;
 
 pub use app::App;
 pub use app::ElmApp;
-pub use pico8::{rnd, sin, Pico8};
+pub use pico8::{mid, rnd, sin, Pico8};
 pub use runtime::draw_data::colors;
 pub use runtime::sprite_sheet::Color;
 pub use runtime::state::Button;
 
 mod controller;
-mod draw;
 mod editor;
 mod font;
 mod graphics;
diff --git a/src/main.rs b/src/main.rs
index ba7e9bda..e6c4c09a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use runty8::{App, Pico8};
 
 fn main() {
-    runty8::run_app::<EmptyApp>("src/editor_assets".to_owned()).unwrap()
+    runty8::run_app::<EmptyApp>("src/editor_assets".to_owned()).unwrap();
 }
 
 struct EmptyApp;
diff --git a/src/pico8.rs b/src/pico8.rs
index a9d3aaa8..9767269a 100644
--- a/src/pico8.rs
+++ b/src/pico8.rs
@@ -116,15 +116,21 @@ impl Pico8 {
     }
 
     pub fn spr(&mut self, spr: usize, x: i32, y: i32) {
-        let spr = self.resources.sprite_sheet.get_sprite(spr);
-
-        self.draw_data.spr(spr, x, y);
+        self.spr_(spr, x, y, 1.0, 1.0, false, false);
     }
 
     pub fn spr_(&mut self, spr: usize, x: i32, y: i32, w: f32, h: f32, flip_x: bool, flip_y: bool) {
-        let spr = self.resources.sprite_sheet.get_sprite(spr);
-
-        self.draw_data.spr_(spr, x, y, w, h, flip_x, flip_y);
+        spr_from(
+            &mut self.draw_data,
+            &self.resources.sprite_sheet,
+            spr,
+            x,
+            y,
+            w,
+            h,
+            flip_x,
+            flip_y,
+        );
     }
 
     // TODO: Test
@@ -183,14 +189,46 @@ impl Pico8 {
     }
 }
 
+fn spr_from(
+    draw_data: &mut DrawData,
+    sprite_sheet: &SpriteSheet,
+    spr: usize,
+    x: i32,
+    y: i32,
+    w: f32,
+    h: f32,
+    flip_x: bool,
+    flip_y: bool,
+) {
+    draw_data.spr_(spr, sprite_sheet, x, y, w, h, flip_x, flip_y);
+}
+
 // Utility pub(crate) methods
 impl Pico8 {
     // TODO: Remove this `allow` when we use it in the editor.
     #[allow(dead_code)]
-    pub(crate) fn spr_from(&mut self, sprite_sheet: &SpriteSheet, spr: usize, x: i32, y: i32) {
-        let spr = sprite_sheet.get_sprite(spr);
-
-        self.draw_data.spr(spr, x, y);
+    pub(crate) fn spr_from(
+        &mut self,
+        sprite_sheet: &SpriteSheet,
+        spr: usize,
+        x: i32,
+        y: i32,
+        w: f32,
+        h: f32,
+        flip_x: bool,
+        flip_y: bool,
+    ) {
+        spr_from(
+            &mut self.draw_data,
+            sprite_sheet,
+            spr,
+            x,
+            y,
+            w,
+            h,
+            flip_x,
+            flip_y,
+        );
     }
 
     pub(crate) fn raw_spr(&mut self, sprite: &Sprite, x: i32, y: i32) {
@@ -215,9 +253,17 @@ pub fn rnd(limit: f32) -> f32 {
     rand::thread_rng().gen_range(0.0..limit)
 }
 
+/// <https://pico-8.fandom.com/wiki/Mid>
+pub fn mid(min: f32, val: f32, max: f32) -> f32 {
+    let mut arr = [min, val, max];
+    arr.sort_by(|a, b| a.partial_cmp(b).unwrap());
+
+    arr[1]
+}
+
 #[cfg(test)]
 mod tests {
-    use super::{rnd, sin};
+    use super::{mid, rnd, sin};
 
     macro_rules! assert_delta {
         ($x:expr, $y:expr, $d:expr) => {
@@ -248,4 +294,12 @@ mod tests {
             assert!(0.0 < random_value && random_value < 50.0);
         }
     }
+
+    #[test]
+    fn mid_works() {
+        assert_delta!(mid(8.0, 2.0, 4.0), 4.0, 0.00001);
+        assert_delta!(mid(-3.5, -3.4, -3.6), -3.5, 0.00001);
+        assert_delta!(mid(6.0, 6.0, 8.0), 6.0, 0.00001);
+        assert_delta!(mid(0.0, 2.0, 1.0), 1.0, 0.00001);
+    }
 }
diff --git a/src/runtime/draw_data.rs b/src/runtime/draw_data.rs
index e3f9414b..b646c16f 100644
--- a/src/runtime/draw_data.rs
+++ b/src/runtime/draw_data.rs
@@ -1,7 +1,8 @@
+use crate::font;
 use crate::runtime::flags::Flags;
 use crate::runtime::map::Map;
 use crate::runtime::sprite_sheet::SpriteSheet;
-use crate::{draw, font};
+use runty8_graphics::ReverseIf;
 
 use super::sprite_sheet::{Color, Sprite};
 
@@ -112,36 +113,6 @@ impl DrawData {
             }
         }
     }
-
-    pub(crate) fn quarter_bresenham(
-        &mut self,
-        cx: i32,
-        cy: i32,
-        radius: i32,
-        color: Color,
-        plot: fn(&mut Self, i32, i32, i32, i32, Color),
-    ) {
-        let mut x = radius;
-        let mut y = 0;
-        let mut error = 1 - radius;
-
-        while y <= x {
-            plot(self, cx, cy, x, y, color);
-
-            if error < 0 {
-                error += 2 * y + 3;
-            } else {
-                if x != y {
-                    plot(self, cx, cy, y, x, color);
-                }
-
-                x -= 1;
-                error += 2 * (y - x) + 3;
-            }
-
-            y += 1;
-        }
-    }
 }
 
 // Functions which more directly implement pico8 functionality
@@ -163,22 +134,30 @@ impl DrawData {
     }
 
     pub(crate) fn rectfill(&mut self, x0: i32, y0: i32, x1: i32, y1: i32, color: Color) {
-        for y in y0..=y1 {
-            self.line(x0, y, x1, y, color);
-        }
+        let (x0, x1) = min_max(x0, x1);
+        let (y0, y1) = min_max(y0, y1);
+        let width = (x1 - x0 + 1) as u32;
+        let height = (y1 - y0 + 1) as u32;
+
+        runty8_graphics::Rectangle::new(x0, y0, width, height)
+            .horizontal_lines()
+            .flatten()
+            .for_each(|(x, y)| self.pset(x, y, color))
     }
 
     pub(crate) fn rect(&mut self, x0: i32, y0: i32, x1: i32, y1: i32, color: Color) {
-        self.line(x0, y0, x1, y0, color);
-        self.line(x0, y0, x0, y1, color);
-        self.line(x0, y1, x1, y1, color);
-        self.line(x1, y0, x1, y1, color);
+        let (x0, x1) = min_max(x0, x1);
+        let (y0, y1) = min_max(y0, y1);
+        let width = (x1 - x0 + 1) as u32;
+        let height = (y1 - y0 + 1) as u32;
+
+        runty8_graphics::Rectangle::new(x0, y0, width, height)
+            .surface()
+            .for_each(|(x, y)| self.pset(x, y, color))
     }
 
     pub(crate) fn line(&mut self, x0: i32, y0: i32, x1: i32, y1: i32, color: Color) {
-        for (x, y) in draw::line(x0, y0, x1, y1) {
-            self.pset(x, y, color);
-        }
+        runty8_graphics::line(x0, y0, x1, y1).for_each(|(x, y)| self.pset(x, y, color));
     }
 
     pub(crate) fn reset_pal(&mut self) {
@@ -191,45 +170,14 @@ impl DrawData {
         self.transparent_color = transparent_color
     }
 
-    // Taken from Pemsa, a C++ implementation of pico8.
-    // This looks similar to Bresenham's circle drawing algorithm.
-    //
-    // See: https://github.com/egordorichev/pemsa/blob/master/src/pemsa/graphics/pemsa_graphics_api.cpp#L393
     pub(crate) fn circ(&mut self, cx: i32, cy: i32, radius: i32, color: Color) {
-        fn plot(this: &mut DrawData, cx: i32, cy: i32, x: i32, y: i32, c: u8) {
-            let points = [
-                (x, y),
-                (-x, y),
-                (x, -y),
-                (-x, -y),
-                (y, x),
-                (-y, x),
-                (y, -x),
-                (-y, -x),
-            ];
-
-            for (x, y) in points {
-                this.pset(cx + x, cy + y, c);
-            }
-        }
-
-        self.quarter_bresenham(cx, cy, radius, color, plot);
+        runty8_graphics::circle(cx, cy, radius as u32)
+            .for_each(move |(x, y)| self.pset(x, y, color))
     }
 
-    // Taken from Pemsa, a C++ implementation of pico8.
-    // This looks similar to Bresenham's circle drawing algorithm.
-    //
-    // See: https://github.com/egordorichev/pemsa/blob/master/src/pemsa/graphics/pemsa_graphics_api.cpp#L393
     pub(crate) fn circfill(&mut self, cx: i32, cy: i32, radius: i32, color: Color) {
-        fn plot(this: &mut DrawData, cx: i32, cy: i32, x: i32, y: i32, c: u8) {
-            this.line(cx - x, cy + y, cx + x, cy + y, c);
-
-            if y != 0 {
-                this.line(cx - x, cy - y, cx + x, cy - y, c);
-            }
-        }
-
-        self.quarter_bresenham(cx, cy, radius, color, plot);
+        runty8_graphics::filled_circle(cx, cy, radius as u32)
+            .for_each(move |(x, y)| self.pset(x, y, color));
     }
 
     pub(crate) fn print(&mut self, str: &str, x: i32, y: i32, color: Color) {
@@ -240,37 +188,78 @@ impl DrawData {
         }
     }
 
+    fn draw_partial_spr(
+        &mut self,
+        spr: &Sprite,
+        x: i32,
+        y: i32,
+        w: f32,
+        h: f32,
+        flip_x: bool,
+        flip_y: bool,
+    ) {
+        let w = crate::mid(0.0, w, 1.0);
+        let h = crate::mid(0.0, h, 1.0);
+        let sprite_buffer = &spr.sprite;
+
+        let iter = runty8_graphics::Rectangle::new(
+            0,
+            0,
+            (8.0 * w).round() as u32,
+            (8.0 * h).round() as u32,
+        )
+        .horizontal_lines()
+        .reverse_if(flip_y);
+
+        iter.enumerate().for_each(|(j, line)| {
+            let line = line.reverse_if(flip_x);
+
+            line.enumerate().for_each(|(i, local_coords)| {
+                let (local_x, local_y) = local_coords;
+                let (world_x, world_y) = (x + local_x, y + local_y);
+                let (screen_x, screen_y) = self.apply_camera(world_x, world_y);
+
+                if let Some(index) = self.index(screen_x, screen_y) {
+                    self.set_pixel_with_transparency(index, sprite_buffer[(i + j * 8) as usize])
+                }
+            });
+        });
+    }
+
     #[allow(clippy::too_many_arguments)]
-    // TODO: Implement w and h params functionality
     pub fn spr_(
         &mut self,
-        sprite: &Sprite,
+        sprite: usize,
+        sprite_sheet: &SpriteSheet,
         x: i32,
         y: i32,
-        _w: f32,
-        _h: f32,
+        w: f32,
+        h: f32,
         flip_x: bool,
         flip_y: bool,
     ) {
-        let buffer = &sprite.sprite;
-
-        for i in 0..8 {
-            for j in 0..8 {
-                let world_x = if flip_x { x + 7 - i } else { x + i };
-                let world_y = if flip_y { y + 7 - j } else { y + j };
-
-                let (x, y) = self.apply_camera(world_x, world_y);
-                if let Some(index) = self.index(x, y) {
-                    self.set_pixel_with_transparency(index, buffer[(i + j * 8) as usize])
-                }
+        let w_spr = w.ceil() as usize;
+        let h_spr = h.ceil() as usize;
+        let (spr_x, spr_y) = SpriteSheet::coords_from_sprite_index(sprite);
+
+        for (w_off, h_off) in itertools::iproduct!((0..w_spr), (0..h_spr)) {
+            if let Some(sprite_index) =
+                SpriteSheet::sprite_index_from_coords(spr_x + w_off, spr_y + h_off)
+            {
+                let spr = sprite_sheet.get_sprite(sprite_index);
+                self.draw_partial_spr(
+                    spr,
+                    x + 8 * w_off as i32,
+                    y + 8 * h_off as i32,
+                    w,
+                    h,
+                    flip_x,
+                    flip_y,
+                );
             }
         }
     }
 
-    pub(crate) fn spr(&mut self, sprite: &Sprite, x: i32, y: i32) {
-        self.spr_(sprite, x, y, 1.0, 1.0, false, false)
-    }
-
     pub(crate) fn cls_color(&mut self, color: Color) {
         self.rectfill(0, 0, 127, 127, color);
     }
@@ -303,7 +292,7 @@ impl DrawData {
                     let y = screen_y + 8 * i_y as i32;
 
                     let spr = sprite_sheet.get_sprite(spr as usize);
-                    self.spr(spr, x, y);
+                    self.draw_partial_spr(spr, x, y, 1.0, 1.0, false, false);
                 }
             }
         }
@@ -316,6 +305,9 @@ impl Default for DrawData {
     }
 }
 
+fn min_max(a: i32, b: i32) -> (i32, i32) {
+    (a.min(b), a.max(b))
+}
 // Pico8 api
 
 fn get_color(index: Color) -> u32 {
diff --git a/src/runtime/sprite_sheet.rs b/src/runtime/sprite_sheet.rs
index 71fd5aa2..1c2754ea 100644
--- a/src/runtime/sprite_sheet.rs
+++ b/src/runtime/sprite_sheet.rs
@@ -50,6 +50,22 @@ impl SpriteSheet {
         self.sprite_sheet[Self::to_linear_index(x, y)] = c;
     }
 
+    /// Converts (x, y) sprite coordinates into the sprite index if within bounds.
+    /// The sprite index is what's needed for functions like `Pico8::spr`.
+    pub(crate) fn coords_from_sprite_index(index: usize) -> (usize, usize) {
+        (index % Self::SPRITES_PER_ROW, index / Self::SPRITES_PER_ROW)
+    }
+
+    /// Converts (x, y) sprite coordinates into the sprite index if within bounds.
+    /// The sprite index is what's needed for functions like `Pico8::spr`.
+    pub(crate) fn sprite_index_from_coords(x: usize, y: usize) -> Option<usize> {
+        if x >= 16 || y >= 16 {
+            None
+        } else {
+            Some(x + y * 16)
+        }
+    }
+
     pub fn to_linear_index(x: usize, y: usize) -> usize {
         let x_part = 64 * (x / 8) + x % 8;
         let y_part = 16 * 64 * (y / 8) + 8 * (y % 8);
@@ -197,6 +213,39 @@ impl Sprite {
 mod tests {
     use super::*;
 
+    #[test]
+    fn sprite_index_from_coords_works() {
+        assert_eq!(SpriteSheet::sprite_index_from_coords(0, 0), Some(0));
+        assert_eq!(SpriteSheet::sprite_index_from_coords(0, 1), Some(16));
+        assert_eq!(SpriteSheet::sprite_index_from_coords(8, 0), Some(8));
+        assert_eq!(SpriteSheet::sprite_index_from_coords(8, 1), Some(24));
+        assert_eq!(SpriteSheet::sprite_index_from_coords(8, 7), Some(120));
+        assert_eq!(SpriteSheet::sprite_index_from_coords(16, 9), None);
+        assert_eq!(SpriteSheet::sprite_index_from_coords(1, 16), None);
+    }
+
+    #[test]
+    fn coords_from_sprite_index_works() {
+        assert_eq!(SpriteSheet::coords_from_sprite_index(0), (0, 0));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(1), (1, 0));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(15), (15, 0));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(16), (0, 1));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(17), (1, 1));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(109), (13, 6));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(117), (5, 7));
+        assert_eq!(SpriteSheet::coords_from_sprite_index(255), (15, 15));
+    }
+
+    #[test]
+    fn sprite_index_coords_roundtrip() {
+        for spr in 0..=255 {
+            let (x, y) = SpriteSheet::coords_from_sprite_index(spr);
+            let roundtrip_spr = SpriteSheet::sprite_index_from_coords(x, y);
+
+            assert_eq!(Some(spr), roundtrip_spr);
+        }
+    }
+
     #[test]
     fn indexing_works() {
         assert_eq!(SpriteSheet::to_linear_index(7, 0), 7);