I wanted to use my Mac from the couch with a game controller, not just play games with it.
Kumanda is a small menu bar app. The left stick moves the pointer, the right stick scrolls, and the buttons click, switch Spaces and press keys. It works with any controller macOS supports, like Xbox, PlayStation and 8BitDo pads. Small buttons are fiddly with a stick, so when the stick rests, the pointer glides onto the nearest button or link if one is close.
When a game comes to the front, Kumanda steps aside, so the game gets the controller to itself. The menu is in Turkish for now.