In Invisibility you have to maneuver your mouse cursor through obstacle courses without touching the walls. If you touch an obstacle or a wall you get sent back to the beginning. The catch is that you cannot see your cursor. Through a lot of trial and error you can feel your way to the end. Remember that you have to click the mouse when you are on the stop square to end the level. (Click the middle of the screen to start.)

• Madness Temple website