Instructions are in game, but I'll put 'em here as well anyways. Use wasd, arrow keys, or the mobile joystick to move. Click or tap to shoot in that direction, try to shoot the shapes. If the shapes touch you, you will lose health. Also, there are upgrades scattered around the map so find those!
All code by me. The title screen song is from @ggenije , and the song during the game is Adventure Meme by Kevin Macleod. Please give credit if you use any of my code.