CART RIDE FOR FREE ADMIN was a Roblox game created by Altronic that debuted in I made a Roblox CART RIDE game... and used ADMIN to mess them up.
The game took place in a desert-looking baseplate with the standard cart ride track. It has some decoration lying around the baseplate, such as a gravestone of Squidward that says "how dig grave". There's also a poorly-built SpongeBob house that is never mentioned in the video, but it sometimes pops up in the background.
When you complete the course, there was morphs, packages, faces, paths, paintball gun and a trowel. The only thing that was actually mentioned up there was the Mr Krabs morph. As of July 1, 2020, the game is currently shut down.