That’s such a neat idea! I enjoyed. The player and obstacles are a little hard to differentiate from the background. Maybe if you gave the player an obvious outline and the obstacles a black outline. The music is fun, reminds me of Henry Stickmin.
I wish the math problem was made more obvious at the beginning, though. Like, with a popup animation or something and some effects to make it stand out more against the background.
Fun game, fun idea, overall amazing.