Really good! the animation on the caracter is great! the music is lovely and the levels are quite nice (With a good difficulty curve, or at least for me)

I liked the boing noise and character.  Would have been nice to have other options for the control, many people like to jump with space or move with arrow keys.  Also, the levels were quite tough but that might have been the goal.

Neat paltformer. Like the animation on the Professor.