Good start
Graphics: Above average
Style: Well, it was kinda boring in some long scenes when you just see the ball breathing, for example. But it was pretty original anyway. Just keep in mind that the average viewer doesn't want to look at a breathing ball for 5 seconds, 2 is fully enough to see what's going on.
Sound: Good, but I seemed to dislike the voice acting, at least the ball's scream, it was pretty cheesy.
Violence / Interactivity: No comment needed
Humor: As a previous guy said it was kinda predictable, and it wasn't hysterically funny. Work on this part.
Overall: Good work, just work more on a good storyline with more action and/or humour. Good luck!