The game is simple: You are the light green square. Use arrow keys/wasd to move. After 5 seconds the first dark green circle will appear. The goal of the game is to collect 100 of these, each one will deal a single point of damage to the boss. The battle will get progressively more difficult. I will let you figure out the attacks of the boss on your own, although you are free to share info in comments.
Double click flag when restarting DIFFICULTY: GODDAMN NEAR IMPOSSIBLE