I have never experienced so much horror in a videogame as having to stand in front of a crowd of LLMs and improvise comedy. That ticking clock makes my brain go to pudding as I try to come up with new material. Such an awesome, memorable experience! Depending on the vibe you're going for, it might make more sense to have the timer start as soon as the prompt is given. If the protagonist would have gotten the prompt beforehand off stage, then yeah, makes sense to let them mull it over on their own time. I personally think the former pushes things in the more dynamic direction.
The art style, UI, and SFX were all very well done. I think everything came together very well. Also, the prospect of adding power-ups between sets sounds like a really fun extension to this setup. I can't wait to plug adverts for cola into all my earthquake jokes. Loved it.