This game is so good on 2 parts. 1: you lean math in a fun and new way. 2: You learn how to do math quick inside your head and that can be good if you still are in school since you have math tests.
I personaly think this game could become a bit better if there was some kind of music in the background, not some lound music but some quiet and peacefull music. Hope to see your game getting bigger.