Source code: Galaxy DamageEffect DamageObject EffectObject FloatingItem Flocks

Built with Processing

Press "R" to stop the game and any key to restart it (WEIRD JAVA BUG)
"WASD"(QWERTY)/"ZQSD"(AZERTY) to move your space ship
"Space bar"/"Mouse right click" to accelerate
"Mouse left click" to shoot (not really useful)

Download (executable/zip): Windows version - MacOSX version