Crypto Catch (Java)

A tiny, fun crypto-themed arcade game written in pure Java 17 + Swing. Move your ledger left/right, catch the falling ₿ coins, and dodge bombs. Rack up score before you run out of lives!

https://user-images.githubusercontent.com/ (placeholder for your GIF/screenshot)

How to play

• ← / →: Move left/right
• P: Pause/Resume
• R: Restart after game over
• Catch coins (+1 point). Hit a bomb and you lose a life. You have 3 lives.

Requirements

• Java 17+
• Maven 3.8+

Run locally

mvn -B clean package
java -jar target/crypto-game-1.0.0.jar

Build & test

mvn -B verify

GitHub Actions (CI)

This repo includes a workflow that runs on pushes and PRs:

• compiles the project (Java 17)
• runs tests
• builds the runnable JAR

See .github/workflows/maven.yml.

Project layout

crypto-catch-java/
├─ src/
│  ├─ main/java/com/example/cryptocatch/
│  │  ├─ CryptoCatchGame.java        (entry point)
│  │  ├─ GamePanel.java              (game loop & rendering)
│  │  ├─ Entity.java                 (base class)
│  │  ├─ Player.java                 (the player)
│  │  ├─ Coin.java                   (collectible)
│  │  └─ Bomb.java                   (hazard)
│  └─ test/java/com/example/cryptocatch/
│     └─ CollisionTest.java
├─ .github/workflows/maven.yml       (CI)
├─ pom.xml
├─ .gitignore
├─ run.sh                           (helper script)
└─ run.bat

Packaging

The JAR manifest already sets the Main-Class, so you can run it directly. To create a zip of the repo for sharing:

git archive -o crypto-catch-java.zip HEAD

Advanced tweaks

• Tune difficulty by changing spawnIntervalMs, fallSpeed, and maxEntities in GamePanel.
• Adjust window size in CryptoCatchGame.WIDTH/HEIGHT.
• Replace the drawn shapes with images if you want custom sprites.

License

MIT