There is a variation of Rock-Paper-Scissors you can play with yoyos. I think the tricks used in the game I heard about were plastic whip, laceration, and hook. Each person throws a sleeper and does one of the three tricks at the same time, and whoever’s trick has priority wins (i.e. laceration beats hook, hook beats plastic whip, plastic whip beats laceration). All three tricks are quick and start off looking about the same, so it’s pretty similar to doing the real Rock-Paper-Scissors except with the added challenge of having to land the trick and being able to do all three well enough to mix them up.
You can also try to read what the other person is doing and make last-second adjustments if you want an extra challenge, but then it gets really difficult to land your trick.