Click the green flag to start. Arrow Keys or WASD to move. Click or press space to fire. C to auto spin, like diep.io, E to auto fire, also like diep.io.
Code: Thanks to @griffpatch for making his tutorials on ball collisions. Player wall detection: Thanks to @northtylerb for his Helpful Algorithms project. Everything else: Me @dcanorth. Art: Me @dcanorth