In this game you're a stickman who fights waves of other stickmen. You start barehanded. Once you defeat one of the enemies he'll drop his weapon and you'll be able to collect it. Other enemies may also drop extra health kits and money bonuses. Your goal is to stay alive. Move your character with the arrow keys. Press A to attack and S to pick up weapons. There's no need to press anything to collect power ups. Just get close to pick them up.