I love math. This was a very cool way to implement the One Rule theme. The game was very easy to understand. Loved the loading screen, score screen. The UI in general was well done. Loved that the numbers floated around and the announcer calling out the change of Forbidden multiplier was cool. The only suggestion I would have is a way to tell if you hit a bad number. I apparently hit 3, but wasn't aware of which 3 I hit that were bad.