Fun edutainment game! I liked how you implemented the math problem segment as a breather to the action as well as a way to get ammo. Smart! Art style is solid but I would say that the background doesn't fit in my opinion. I'm one to talk but I don't think the theme was implemented well. I also think a place to explain the controls, even just on the itch.io page would be key. Didn't know I could jump until Wave 6. The enemy variety was also cool, from the heat seeking projectiles to the jets. Congrats on the release!