Version Beta 0.2 - Hangar Screen and Skill levels

- Added 3 Difficulty Levels (Easy, Normal, Hard)
- Added 4 new ship sprites (based on the original game)
- Implemented Hangar Screen to select ship model, ship and shield colors
- Added option to save high scores and hangar settings to disk
- Added Game Over screen with mission statistics
- Added more aliens wave configurations

CHANGELOG.md

@@ -0,0 +1,33 @@
+## Retaliate 64 Changelog
+
+##### v0.2 - 18-Jan-20178 - Hangar Screen and Skill levels
+
+- Added 3 Difficulty Levels (Easy, Normal, Hard)
+- Added 4 new ship sprites (based on the original game)
+- Implemented Hangar Screen to select ship model, ship and shield colors
+- Added option to save high scores and hangar settings to disk
+- Added Game Over screen with mission statistics
+- Added more aliens wave configurations
+
+##### v0.1 - 30-Dez-2017 - Initial Version
+
+The main additions/changes to the code from the book were:
+
+- Added a splash screen for the game
+- Added the Retaliate logo (as sprites) on the Menu
+- Added a intro screen with game story/instructions
+- Added a credits screen
+- Changed sprites of the ships to reproduce Retaliate design
+- Changed aliens movement from swinging horizontally to moving down vertically
+- Implemented ship-to-ship collision logic
+- Limited the vertical movement of the player ship
+- Implemented the shield (activated with joystick down)
+- Implemented the shield energy gauge on the bottom line
+- Implemented limited bullets for player, and added an Ammo counter on screen
+- Implemented bullet collection feature (using the energy shield)
+- Reduced to a single life for the player
+- Changed score system to: 5 points killed by shield, 10 points killed by bullet
+
+---
+Original repository <https://github.com/lvcabral/retaliate64>
+Copyright (C) 2017,2018 Marcelo Lv Cabral - <https://lvcabral.com>

README.md

@@ -1,7 +1,7 @@
 # Retaliate for the Commodore 64
 Project to remake, using 6502/6510 Assembly, the space shooter game Retaliate (available on Roku & Android)
 
-![Retaliate Screens](http://lvcabral.com/images/C64/RetaliateScreens.png)
+![Retaliate Screens](http://lvcabral.com/images/C64/RetaliateScreens02-900px.png)
 
 ## Introduction
 After developing remakes of classic 8bit games (Prince of Persia, Lode Runner, Donkey Kong) to the Roku platform (streaming box/TV OS)
@@ -27,38 +27,21 @@ for the Commodore 64, and still is an ongoing project, this way, as I learn more
 If you found bugs or have any suggestions please go on and report those at the [Issues Backlog](https://github.com/lvcabral/retaliate64/issues), 
 and If you also want to collaborate with the game, fork the project and send your pull requests!
 
-![Retaliate Gameplay](http://lvcabral.com/images/C64/retaliate64-beta-gameplay-300px.gif)
-
 ### Features
-With this initial release my main goal was to implement the basic funcitionality to reproduce (as much as possible) the original game mechanics and graphics.
-
-The main additions/changes to the code from the book were:
-
-- Added a splash screen for the game
-- Added the Retaliate logo (as sprites) on the Menu
-- Added a intro screen with game story/instructions
-- Added a credits screen
-- Changed sprites of the ships to reproduce Retaliate design
-- Changed aliens movement from swinging horizontally to moving down vertically
-- Implemented ship-to-ship collision logic
-- Limited the vertical movement of the player ship
-- Implemented the shield (activated with joystick down)
-- Implemented the shield energy gauge on the bottom line
-- Implemented limited bullets for player, and added an Ammo counter on screen
-- Implemented bullet collection feature (using the energy shield)
-- Reduced to a single life for the player
-- Changed score system to: 5 points killed by shield, 10 points killed by bullet
+My main goal is to implement the basic functionality to reproduce (as much as possible) the original game mechanics and graphics.
+The current release (v0.2) introduces the new ship sprites (image below) and the Hangar Screen to select and save the ship model and colors.
+
+![Player Ship Models](http://lvcabral.com/images/C64/retaliate-ships-comparison.png)
+
+Open the [Changelog](https://github.com/lvcabral/retaliate64/blob/master/CHANGELOG.md) to check all the currently implemented features.
 
 ### ToDo List
 The current planned improvements are listed below:
 
 - Multiplex sprites to have bigger alien waves
-- 3 Difficulty Levels (Easy, Normal, Hard)
-- Hangar Screen to select ship model and shield color
 - Add Gameplay Background Music (any SID expert to help?)
 - Improve sound effects
 - Multiple high scores table with names
-- Save high scores to disk
 
 ## How to Play the Game
 You can run the game on a real Commodore 64/128 or using an emulator, below the two methods:
@@ -87,8 +70,10 @@ You can run the game on a real Commodore 64/128 or using an emulator, below the
 5.	Open project file retaliate.cbmprj
 6.	Press CTRL+F5 (build project and execute)
 
+![Retaliate Gameplay](http://lvcabral.com/images/C64/retaliate64-beta-gameplay-300px.gif)
+
 ## Resources Used
-These are the books, tools and websites that are helping me developing this project:
+These are the books, tools and websites that are helping me to develop this project:
 
 - [Retro Game Dev: Book by Derek Morris](https://www.retrogamedev.com/)
 - [Romans I XVI Gaming: Original game developer](https://www.romansixvigaming.com/)

source/gameAliens.asm

@@ -4,7 +4,7 @@
 ;  Copyright (C) 2017,2018 Marcelo Lv Cabral - <https://lvcabral.com>
 ;
 ;  Distributed under the MIT software license, see the accompanying
-;  file LICENSE or http://www.opensource.org/licenses/mit-license.php.
+;  file LICENSE or https://opensource.org/licenses/MIT
 ;
 ;===============================================================================
 ; Constants
@@ -14,15 +14,14 @@ AliensFirePatternMax = 50
 AliensRespawnDelay = 255
 AliensYStart = 30
 AliensYDelay = 1
-AliensYSpeed = 3
 AliensYPriorityTop = 56
 AliensYPriorityBottom = 224
 AliensExplode = 12
 AlienRed = 5
 AlienShooter = 6
 AlienFirePos = 70
-WavesMax = 7
-WaveIndexMax = 37 ; last index + 1
+WavesMax = 10
+WaveIndexMax = 55 ; (WavesMax - 1) * 6 + 1
 
 ;===============================================================================
 ; Variables
@@ -32,21 +31,28 @@ aliensActive            byte   0
 aliensCount             byte   0
 aliensWaveIndex         byte   0
 aliensWaveTimeIndex     byte   0
-aliensWaveTimeArray     byte  25,  15,  25,   5,  25,  15, 25
+aliensWaveTimeArray     byte  25,  15,  25,   5,  25
+                        byte  15,  25,  15,  25,   5
 aliensWaveArray         byte   6,   5,   5,   5,   5,   6
                         byte   6,   6,   6,   6,   6,   6
                         byte   5,   5,   6,   6,   5,   5
                         byte   5,   5,   5,   5,   5,   5
                         byte   6,   5,   5,   5,   5,   5
                         byte   6,   6,   6,   6,   6,   6
                         byte   6,   5,   5,   5,   5,   6
+                        byte   5,   6,   5,   6,   5,   6
+                        byte   5,   5,   5,   5,   5,   5
+                        byte   5,   5,   5,   5,   5,   5
 aliensFormationArray    byte 100,  50,  70,  70,  50, 200
                         byte 100, 100, 100, 100, 100, 100
                         byte  50, 100, 200, 150, 100,  50
                         byte  50,  50,  50,  50,  50,  50
                         byte 200,  90,  80,  70,  60,  50
                         byte 100, 100, 100, 100, 100, 100
                         byte 200,  80, 100,  80, 100, 200
+                        byte  50,  50,  50,  50,  50,  50
+                        byte  50, 100, 150, 150, 100,  50
+                        byte 100, 100, 100, 100, 100, 100
 aliensFrameArray        byte   6,   5,   5,   5,   5,   6
 aliensFrame             byte   0
 aliensColor             byte   0
@@ -79,6 +85,8 @@ aliensPriority          byte   0
 aliensStep              byte   0
 aliensCollision         byte   0
 aliensScore             byte   0
+aliensSpeed             byte   3
+aliensSpeedArray        byte   3, 3, 6
 
 ;==============================================================================
 ; Macros/Subroutines
@@ -320,7 +328,8 @@ gAUPIShooters
         bcs gAUPISetPosition
        
 gAUPIIncMove
-        adc #aliensYSpeed
+        clc
+        adc aliensSpeed
         sta aliensY
         cmp #254
         bcs gAUPIMoveUp

source/gameBullets.asm

@@ -5,7 +5,7 @@
 ;  Copyright (C) 2017,2018 Marcelo Lv Cabral - <https://lvcabral.com>
 ;
 ;  Distributed under the MIT software license, see the accompanying
-;  file LICENSE or http://www.opensource.org/licenses/mit-license.php.
+;  file LICENSE or https://opensource.org/licenses/MIT
 ;
 ;===============================================================================
 ; Constants
@@ -15,33 +15,35 @@
 
 BulletsMax = 10
 Bullet1stCharacter = 64
-BulletSpeed = 3 ; higher number slower bullets
+
 ;===============================================================================
 ; Variables
 
-bulletsXHigh    byte 0
-bulletsXLow     byte 0     
-bulletsY        byte 0
-bulletsXCharCurrent byte 0
-bulletsXOffsetCurrent byte 0
-bulletsYCharCurrent byte 0
-bulletsColorCurrent byte 0
-bulletsDirCurrent byte 0
-
-bulletsActive   dcb BulletsMax, 0
-bulletsXChar    dcb BulletsMax, 0
-bulletsYChar    dcb BulletsMax, 0
-bulletsXOffset  dcb BulletsMax, 0
-bulletsColor    dcb BulletsMax, 0
-bulletsDir      dcb BulletsMax, 0
-bulletsTemp     byte 0
-bulletsXFlag    byte 0
-
-bulletsXCharCol byte 0
-bulletsYCharCol byte 0
-bulletsDirCol   byte 0
-
-bulletsUpdCnt   byte 0
+bulletsXHigh            byte 0
+bulletsXLow             byte 0     
+bulletsY                byte 0
+bulletsXCharCurrent     byte 0
+bulletsXOffsetCurrent   byte 0
+bulletsYCharCurrent     byte 0
+bulletsColorCurrent     byte 0
+bulletsDirCurrent       byte 0
+
+bulletsActive           dcb BulletsMax, 0
+bulletsXChar            dcb BulletsMax, 0
+bulletsYChar            dcb BulletsMax, 0
+bulletsXOffset          dcb BulletsMax, 0
+bulletsColor            dcb BulletsMax, 0
+bulletsDir              dcb BulletsMax, 0
+bulletsTemp             byte 0
+bulletsXFlag            byte 0
+
+bulletsXCharCol         byte 0
+bulletsYCharCol         byte 0
+bulletsDirCol           byte 0
+
+bulletsUpdCnt           byte 0
+bulletSpeedArray        byte 3, 3, 1    ; higher number slower bullets
+bulletSpeed             byte 3
 
 ;===============================================================================
 ; Macros/Subroutines
@@ -131,7 +133,7 @@ gameBulletsUpdate
         ldx #0
 
         lda bulletsUpdCnt
-        cmp #BulletSpeed
+        cmp bulletSpeed
         beq buloop
 
         inc bulletsUpdCnt