Yeah, can't speak to the genie creating anything novel, but making a riff on an existing game was quite simple.
We have talked about the workout app idea as well, also a gardening app (like when to plant, when to re-seed based on your zone), and a recipe app (like what is in season that you should buy along with recipes for those in-season ingredients).
I did start working on a gin rummy game to replace an app but the apps free so less motivation (even though it’s probably selling my data).
I have dreams of making a few simple games but time is hard to find.