Amazing game! You did a great job with character design, all of them really stand out and look adorable. Animation is well done, too. Almost everything is animated and there are transitions between scenes. The game looks fantastic!
There is a great variety of spells to learn. Also, introduction of new enemies and level layouts keep the game fresh. The final level is quite challenging and requires you to kill enemies quickly, just waiting for them to come won't work.
I think you did an incredible job with the game and I could definitely see this as a full game with a story and more content.