Pick up yellow powerups, avoid being shot by advancing enemies, and blow up everything in sight with your arsenal of square-tacular weapons!
玩法：
WASD - Move (Treated as arrow keys, w-up, a-left, s-down, d-right)
MOUSE - Point and click to shoot.
SPACE BAR - Pause or unpause the game.
'M' KEY - Toggle in-game music on or off.
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