Jump n' climb as high as possible. Use the mouse to set jumping angle and power, use arrows to move, release the mouse button to jump and try to land on a platform. Beware of moving and shrinking platforms, and use your superjump power to clear tough situations.
Simple yet challenging control mechanism makes the game easy to play but hard to master. It leaves always room for improvement. Can you reach 30 meters? 100 meters? Even 300 meters? Try it out ;)