This is a really cool project! I love the art and personalities. Simple but stylish! I especially love that transition animation!
My only real cratiqe is that I'm not sure how the power ups work. It seems I can shoot multiple attacks at once if I use the same character repeatably... but doesn't that discourage switching characters? I also am not sure what is the difference between the witch and wizard other then the witch having a longer wind up time and slightly bigger shots.
with how small the enemies are, it was also really hard to time shots until the enemies are right at the tower. Kinda wish at least one of the character had slight homing shots. And that the tower's health bar was bigger to give me time to adjust my strategy.
Anyways, you all did amazing!