Make a project of a Monkey Ball-like level from top-view (either remix this or make a seperate project with a link in the comments) If you win, we'll take your level and recreate it in 3D for SMBR!
The sheer amount of effort put into a project that really all was need was to say "we're hosting a level contest" is uncanny. Oh! I forgot to say, you can enter as many times as you like. (Again, didn't discuss this with Luke, becuase I'm evil)