W a s and d to or arrow keys to move. Powerups appear sometimes. F power up: The F power up creates a force field that knocks enemies away for three seconds. S power up: The S power up increases your speed for ten seconds. Rectangular power up: The Rectangular power up increases your ammo by two, which can allow you to knock away enemies at long range.
The ammo and speed pickups stack, but the forcefield one does not.
