I couldn't really play it, cause my computer started lagging, but the design looked really basic. But you said it was just a school project, so I didn't expect much. I don't know if it was the lag but the controls were a little delayed. Like Zanzlanz said, level design, and collision. The spiked balls do nothing but take up space.. GOOD TRY though, 2 stars for effort, 1 star for.. um.. having another star -shrug-

I thought this game was okay! You need to pay attention to details, such as consistent graphics, out-of-place level design, and incorrect collision.
I liked how you could jump off of walls, whether intentional or not - it made the game much more fun.
I didn't mind the music! I thought it was easy listening, and matched the feel of the game.

this is pretty awful,the animation is bad, i can just walk in air without falling, the music is also horrible and just loops.

cant even go back

Charming but imprecise. You can't see where you can walk or not.
Walked over holes on the platforms without falling though, and failed to jump through a clear opening. As a sketch for a game to come then okay - I'd look forward to hop and bop in such a game.
As it is, it's unfinished.