Type GUBBLEDCHEAT at the title screen.
You'll hear Gubble D. Gleep laugh
F8 - God mode toggle.
F9 - Complete any level.
+ - Speeds you up.
- - Slows you down.
(only works from a launch pad on the map)
Page Up Warps you to the next level.
Page Down - Returns you to the previous level.
Home - Advances you 10 levels.
End - Takes you back 10 levels.
(only works from anywhere on the map)
F3 - Removes all blocks from the map
F9 - Warps you to the next city map.