Restore heath and rolling power
To restore heath press 'F3'
And rolling powerPress 'F4.'
Skip a Level
To do this you press and hold F1 and it will automatically jump to the next level.
Beat the game
To do this you press and hold F2 and you will see the video at the end of the game.
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.