Steven uses a Nintendo 64 controller to shoot the drills laser at the gem shard mutants, there's even a little joke ripping on the at-sometimes ridiculed and disliked controller's analog/D-Stick when Steven says "This doesn't feel right!!", in which Peridot tells him to use the D-Pad instead. The controller's D-Stick is often considered one of the worse due to it commonly breaking and hard to control, plus the controller itself never "felt right" cause of its odd shape and uncomfortable way you'd grip it.
We see the cluster for the very first time.