Good
You've obviously spent a lot of time on this so I thought I would give you a proper review.
The game-play is well made, although clunky at points. Although some of the mechanics are well thought out, I often found myself missing several jumps or slides, simply because I couldn't see it before I reached it.
The graphics are quite low quality. I cant help but think that a dedicated graphic artist on board would've helped this project immensely. It seems like you ran out of time on the project and had to use the place-holders for the characters, instead of designing actual characters. In future, keep it simple.
Also the use of low quality gradients shows little or no knowledge of proper graphic design. One thing that I did find good about the graphics was that they were quite consistent, however consistency will not make graphics any better if they are consistently bad.
Audio was good, and it didn't take itself too seriously. The background music was fitting and fun to listen too, without distracting from the game-play. The quality of voice-overs was highly lacking, however, with the only voice I found actually bearable being the voice in the tutorial.
Game-play: 7
Graphics: 4
Audio: 8
Overall: 6