To be honest, creating compelling gameplay is one of the hardest things to do in this short period of time so I wouldn't be too hard on yourself. Not to underestimate all the work that goes into making things, but if you have worked on other projects before, you can borrow your own code or re-do assets, or take inspiration for a cover photo or UI benchmarks online. But creating a new idea that translates to good gameplay, that's what makes it "Innovative" so, that's a really hard thing to do in game jams. We also had a lot of repetition in ours with such a short amount of time. As for the quit button, no worries lol! I just like to press buttons.