Lol, nice save with the google drive link in the comments. I really like the game concept! I wasn't quite ready for the math-attack initially, especially with them giving me crazy not-so easy numbers to do in my head lol. But yeah, W game. I'd probably include some kind of difficulty scaling that starts the numbers off easier, like subtracting by easier numbers like 2s or 5s, and then get up to the crazy stuff like 7s and up. That's the only nitpick I really have though, nicely done! ^.^