I am not taking your ideas, but this is my first jam and this is super cool! have been wanting to do a horror game for a while, so this should be really fun :D
I always wanted to try a retro shooter. So a strange planet is a great place to let it take place. Not the most creative idea, butI think it is fund to make.
I had an idea of making a game with a demon school in which you were trapped, and you had to escape while preventing getting seen by them. I have already rejected it so you can take it if you want.
I'm making a one-screen platformer where the level get weirder each time you play it; thought that a strange environment (like a planet) would be the most chosen idea, so I tried to think of a different interpretation