Such a cool idea! Fun game, awesome art and audio, congrats!
I dont understand if background color in the actions you choose means something or its just random. I suggest it could mean the difficulty of the math question or something so you easily recognize where are the easy ones and decide which to choose. But the game its very good as it is, i cant think of any other suggestion to improve it, well done !
Also, you can try my game if you want, it just takes 5 minutes ;)