Pick up the trap sets and place the traps to capture the ghosts. If you caught a ghost, it turns into some kind of useful tool: the yellow one becomes a bucket full of paint, and the green one becomes a first aid kit. Pick up the paint bucket and move through the maze avoiding collisions with ghosts. If you do get hurt, go to the first aid kit. If you run out of paint, go over a bucket of paint.
When you've painted the entire maze, run to the exit to escape.