Normally I'd be against the use of ai.
But given that you don't have money to make the art, and how much time plus money that would take, I give it a pass as the interactions are fun as they are.
Maybe in the future the stuff can be replaced with art, but that is a long long ways away.
I leave suggestions to get an idea out of my head, if it gets used, it gets used, if not no big deal.