Cheat mode - Enter one of the following codes at the Mos Eisley cantina to active the corresponding cheat function:
Easy Studs - Select the "Escape From Echo Base" level. Choose any blaster character and Gonk droid. At the part where you see a square of silver Studs, with the first grapple hook press A. Build the computer thing and go through to the next room. Change to the Gonk droid when you start sliding down the hill and go back into the room you just came from. You should find 14,000 Studs. You can repeat this as many times as desired.
Sandbox - Get a "True Jedi" rank on all levels to unlock the Sandbox.
True Jedi rank - Collect 10,010 Studs in a level to get a "True Jedi" rank for that level.