Description: Fight your way through 27 waves of Zykon alien invaders. Cleverly use 6 different towers that slow, stun and power burn to defend against enemies that heal, regenerate, split and fly.

Instructions: Use your mouse to build towers and defend against Zykon invaders. You can change the game speed by clicking the "1X" at the top left corner. Hotkeys: P - pause M - mute TAB - cycle through towers U - upgrade tower ESC - dismiss selection SPACE - show/hide enemies' bars and towers' levels