Gameplay: Kill all spammers. Survive 25 waves and win, or compete other players in Survival mode for longest survival time. Game features: Sound and blood splashes could be turned off. Different types of enemies and allies. Four types of bonuses/powerups. Five types of "bad bonuses". Seven weapon types. Weapon overheat. Two play modes - Survival and Waves. In-game pause and pause when mouse out of game screen.