I made two games this GTMK jam. The first is a social anxiety during networking simulator
https://silevran.itch.io/social-networking
The idea behind this was that we started with a choice-based visual novel with only one decision. We tried doing weird things with narrative structure, but it just didn't have the umph we wanted for uniqueness. So we ended up going in the direction of only have one answer to stick to when answering a bunch of questions, and it turned into a challenging game mechanic!
And the other is a skill game. I just wanted to make a challenging game with one-button controls
https://kdharrington.itch.io/terry-flight