Introducing... The Rotating Platformer! 30 levels of absolute challenge as you switch gravity and spin around! Arrow keys to move, of course. Press "S" to skip. All levels are possible, though many are difficult. Good Luck! Physics coding by me. Rotating effect by @I8D, along with a few other improvements. Music from Mario Galaxy. The game is 100% pen, but the thumbnail and end-screen are not pen.
If you want to remix, just simply credit my user name and that is okay already.