This game was not made by me, but I’m featuring it because I like it!

Paint walls of an invisible maze with blood of your enemies to find an exit from the maze.

Controls:
A: left
D: right
space: action
fire: left mouse
S: down
W: up
movement: arrow

How to find an exit from an invisible maze? Well, you get to be an artist and use the blood of your enemies to paint the walls with it. When you paint your path through the maze, you must find keycards to unlock and destroy a processing computer. After destroying it you will be transfered to the next more complex maze and so on until the last maze where you must destroy the main computer freak and alien boss.