Mustard Math apk game v4.0 for android

We made this game to help students practice their maths! We won 
 the Congressional App Challenge with this game! 

Dodge asteroids, pick up trash, and answer math questions!

This game is suitable for students of all grade levels. It starts out giving simple problems, but as you answer them correctly, the difficulty increases and you get tougher questions. The difficulty is saved, so if you close the game, and then open it again, your "level" or difficulty level will stay the same.

First Release