On the start screen, when you press start , then quickly press and hold ~. then a screen will come up with all 10 levels.
Restore Health And Rolling Power
To restore heath press ~ F3 And rolling power
Skip A Level
To do this you press and hold ~ F1 and it will automatically jump to the next level.
Free Master Key and Coins
To do this cheat you press and hold ~F5 and you will get a master key to unlock all doors and coins to ride the water spider.