flatis (spelled with no capital letters) is a famous user. He has two featured levels. He often made levels where you are shrunken in a house.
flatis is retired, and it is not known if he will come back anytime soon, or at all.
flatis was making a level before he went. It was discovered by trotterski and dries_was_here.
-The Mouse Hole
The user Huge Hand is heavily inspired by flatis. He makes levels very similiar too.
For more info, visit the page about him.
- He may have retired because his last replay was by "flatis sucks!".