You play as a scientist trying to save his baby from a castle filled with creepy old men and bats. He needs to pass many rooms each guarded by the creepy old men. Shoot stones at the colored walls, to make them red, blue or yellow. When the colored stones hit the creepy men they will die. Red men can be killed with red stones, blue with blue stones and green with green stones. In the castle you will also find mirrors: you can make them change color, so you can get the stones you shoot at it the color you need. Beware of the skulls!
Use the arrow keys to move. Aiming and shooting is done with the mouse. Press S to make the mirrors change color.