Be astonished by the graphics of this game.
Use the arrow keys or zqsd/wasd to move. Use your mouse to click on the projectiles. This game is not recommended for laptop users without a mouse. Your objective is to evade a red square en beat it by clicking the projectiles. This is also your only defense against the projectiles. In the background you can see how much health the boss has left. The boss has 4 attacks and it's 'attack behavior' changes as you make it lose health.
This game is made in about 4 hours.