MADE 9:37
We've set up for the game jam. I'm thinking I will make something for my iPhone where a player is using the backbone controller (picked a iOS lightning play station style one up for low now that the price dropped 80%). So I'll whip up a generic test project for the inputs. I have a another idea to use the TAP (TPSC001) to keep track of what fingers the player uses to press which button. But that's a bit wild and I can't think of what would be fun about that.
2778 x 1284 resolution
https://manual.gamemaker.io/lts/en/The_Asset_Editors/Object_Properties/Async_Events/System.htm
https://manual.gamemaker.io/lts/en/Quick_Start_Guide/Movement_And_Controls.htm
many many hours later: