Oh, my, god.
That was simply amazing. The sprites were extremely well done. You clearly put alot of work into the aspect of the animation.
The violence and interactivity were the low points, but this wasn't an action flash nor was it a flash game... so, it's all good.
As for the sound, style, and humor: what more can be said? The voices are done so wonderfully, as was every noise Mario made. The scene with Yoshi was, quite easily, my favorite one.
I'd love to see more, even though this was a school project! Perhaps make a series of Lakitu teaching Mario various scientific lessons?
Keep up the good work!