If sans got trapped in a notebook. This is a plat former. Up arrow key to jump, left and right to move. I do know about the start up glitch(Weird things on screen, with or without music), and the nonmoving glitch. But if there are anyothers, let me know.
Credit for the Sans image, (original), music, and sound effects to Crazy8dude who I think got it from undertale. (Actually I'm sure now)
