Fun concept, and I love the art! The sprites are really nice to look at, and all have really fun and unique designs. Once you understand the gameplay, it becomes quite engaging too.
For my main criticism, I think the game would be much better with a more detailed menu screen, and an ingame explanation of how the game works. Currently, it takes a bit of time to figure out what everything means and get used to the game. It would also be nice to have more time and clarity after each answer to see if you were right or what you did wrong. I also think that the numbers should reset to 0 after each answer to properly show that you're on a different question now.
Overall, the game was surprisingly enjoyable. Good job on the submission!