What are some cool original ideas for a top-down gimkit?

I’m trying to make a new gimkit, but I can’t figure out what I want to do it on. Please help!

There are plenty of guides on the forums that you can read with ideas!

I’ve got it: A tower/wave defense game
@FAST_Developer don’t be mad I took your idea for someone else

Why? Just Why? Im gonna have to cancel the whole project because it might not be Original