I liked the quizzes providing a break when things got hectic and the ability to nullify damage. Well done. Cheers!

I really like the concept behind, but it was difficult to avoid the answers since the moment that everyones comes to you at the time, anyway great concept!! i really enjoy it

This isn't a particularly new idea, but it's fairly well implemented. I had no trouble with the controls, and it's nice to have a second chance to recover in what would otherwise be an unforgiving game.

I do have a couple nitpicks:
- At one point, I had 130% health. I assume if I kept getting hit and answering questions right I could go even higher. This doesn't seem right.
- The question about Pythagoras has the wrong answer set. He wasn't the first person to anything the theorem he's named for. That honor goes to an unnamed Sumerian.
- It would be nice if when you got the wrong answer, the game would tell you what the right one was. The questions don't repeat often enough for this to cause an issue, and the current setup leaves me curious for the more ambiguous questions.
- The shooting bit of the game is controlled with a keyboard. The quiz is controlled with a mouse. Switching between them got a bit irritating after a while. I'd have liked hotkeys for the quiz.
- I'm not sure why you felt the need to loop the levels. Having a "you won, hurrah" screen would've been more satisfying.

The graphics are a bit all over the place. Did you make them all, or borrow some? The Jam rules do request you disable graphics rating if not all the graphics are yours.

Quite nice overall feeling, but also quite nice set of questions. When several enemies are right next to you, it is however quite impossible to get back to game, since you get immideately new question. No way to reset level and switching between mouse and keyboard were slightly annoying as well. I really liked the drawn icons though.