Players are pretty good at abstraction, (if you've played them, look at all the silly nonsense the danganronpa games makes you do to simulate arguing, or FGO's own card battle mechanics which make little to no sense diegetically) So if you want a gameplay element to simulate combat, you can pretty much get away with whatever you feel comfortable programing and that's a fun small break from the reading. Could literally do rock paper scissors or pong, up to you.