Its Cute :)
The colour scheming was very cute and pretty. rendered with a nice glow. One problem I had was the particular font you used. It can be quite difficult to see the difference in the numbers, or even reading the menu.
I also noticed I could upgrade some of my critters, leaving me with negative mana. Not 100% sure on how that worked, but ok :3
I did enjoy it though. Thumbs up.