So, I played the game and it's quite fun for an endless runner with some math in it. However, I ran into a few problems. But first, here's what I like about the game.
1. The visual effects and art style are nice.
2. The theme is cool and fun to listen to.
3. The controls are very accessible and not that complicated.
4. The UI, despite being a bit empty, is solid (for the most part).
What I don't like:
1. Whenever you fail a round, the game just fades to black and there's no retry or back to main prompt. You're just stuck there and the only way to replay is to close the game entirely and start over.
2. The main menu could've had more work done to it.
3. The player fail condition is a bit vague. 1 round, I was playing on the "I Love Suffering" mode and I made the wrong decision on the first game. There were literally no zombies in front of me, but the game decided that I was not worthy of carrying on and exploded my poor single trooper anyway. I feel like making the player fail when having all his troopers get killed by zombies instead of just dying immediately is a better approach.
4. Also when I was playing on "I Love Suffering" mode, one of the formulas was so long that it clipped over to the other gate :P
Over all, the game is fun to play and I think with enough polish, you can turn it into something very good.
Cheers