Use the arrow keys or wasd to move the aiming thingy. Press space to shoot. Different enemies have different amounts of HP. You get more points from the harder to kill enemies. All enemies give you ammo when killed, but the only one that gives you more ammo than you use to kill it is the tank. Max ammo is 450. Ammo regenerates by 1 every 1 fourth of a second. If ammo is less than 10 the time for ammo to regenerate is 4 times longer.
