You'll have to do some tricks and special jumps to pass to the next scene. And it will be more difficult as you advance! When a level starts, a list of movements to perform is provided (they are drawn at the top) and you have to complete them all to pass to the next level.
Arrow keys left/right to rotate in one sense or in the other; arrow key up to propel yourself upward (you can combine it with the arrow keys left/right to jump in a certain direction). When you release the arrow keys left/right, the jumper stays a long time extended like a table, so be careful because he (or she) just has to touch the trampoline with his feets to avoid to be hurted!