Hi, great question!
As I was playing Ultracube with a friend, we felt that there wasn't very good feedback letting us know how our factory was doing. Since I had prior experience with modding buttplug.io support into Risk of Rain 2, we came up with the idea to use it for haptic feedback whenever the cube is in use.
It took about one day to code, and we've found it to be both helpful and fun to use. The feedback has already helped us to locate several inefficiencies in the factory, so I consider it a major success!
