Never before would I think of someone combining zombie survivor with math. Great job with this one!

Interesting take on math :D

Good job in finishing your game. It was fun to play, but my typing really relies on autocorrect, so I did poorly on the boss. My only issue were with the zombies coming from the top of the screen. You needed to wait for them to come down further enough to read the math problem.

I'm totally incapable of doing quick math, but I still recommend  the game for those that are able. I'm sure you will find it challenging :) Art and sound effects are awesome.
As someone else said in the comments, I think it'd be cool to also use the game for learning purposes. 
Good job!

Math is good for everything, even saving you from a zombie apocalypse. I loved how the game forced me to sharpen my mind by doing quick math, it feels satisfying to be able to get through the zombies' heads by getting the math right. I also loved the sound effects.

Great work!

Would make a cool learning game, really unique take on the zombie survival.

Interesting take on the survival wave genre. I hope you are both  good at math and aiming.

I think it's a great game, especially considering it was made by just 2 people in a short amount of time. The visuals are simple but effective (I love pixel art). I also really liked the sound effects. The difficulty of the game can vary a lot depending on luck, I had some games where I had a bit more time to think because the zombies were walking all over the place. The typing at the end completely changes the gameplay, making it clear that you're facing a boss (RPG fan here), and that's really cool. And as a final comment, it made me think and sharpen my math skills.