Use the mouse to aim, and the space bar to shoot. Press 'R' to reload, and WASD to move. You can also press 'P' to pause the game. The game will start to lag a lot as the number of enemies increases. I blame flash player.
HUD Guide: Top Left: FPS Counter. Top Middle Left: Score. Top Middle: Amount of Ammo. Press 'R' to reload. A progress bar will then display showing you how long it will take. Top Right: Health, regenerates. The game features large amounts of spread, so the more you fire, the less accurate you get. Stop shooting to reset your accuracy. Version 0.8: -Health packs now spawn every 10-20 seconds. -Game progresses slower -Enemies now spawn slower, in bunches. Version 0.9: -Enemies now take 3 shots to kill.