Rat on the Run
Ratty will automatically walk forward. If he touches a wall he will turn around and walk the other way. Sometime you pass a stop sign, where ratty will halt and wait for your command to continue. When Ratty is walking you can make him jump by pressing the mouse button to avoid the enemies and to reach new platforms.
As well as cheese, the stages are filled with various enemies. You have to watch out for spiders, slimy blobs, razors and other things that can harm you. You have three lives, and if you die you restart at the last stop sign.