As a game developer, I've always liked the idea of making educational AND fun games, so I always appreciate it when people make things like that.

I like the concept and I think this game can be put on a math site or something. However, it can use some improvements. Some of the game art (the stick figures especially) could use some improvement and if you wanted to go a step further and overhaul all the graphics to make the game look less "math-game-like", I think that would draw in a wider audience. Also, if you added different difficulty settings or levels that would that could be really useful for more beginner players. Overall I like the type of game you've made, I hope you update cause it definitely has some potential.