Interesting
You definitely need vector shapes here, the bitmaps just doesn't work. Go and trace the pictures. It would be nice if the mouths of the characters where moving for real instead of just in the suptitle bar.
You should also put some more effort into finding new sound effects, it's not that they are bad, it's that they are overused by everyone using the same effect.
Overall, an interesting beginning, but it has room for improvement without having any direct faults.