Use arrow keys to move and space to shoot. Press the yellow block to take damage from your HP. You get $2 for hitting the enemy, you can destroy the red an yellow bullets by shooting at them but not the spiky one which expands. however I haven't added a upgrade shop for the coins yet you should have a 1 second invincibility frame.
There is a glitch where Boss doesn't move. Just click green flag again to restart it and it should work fine.
