Zibob
50510
Working Twin Stick Steam Controller (2015) about 8 hours
combined playtime May not be fully optimised the way you lke but it is at least a working twinstick config, with all the ingame controls assigned. NOTE: You still need your keyboard for the Enter key on the menus.
Keyboard Inputs Gamepad Inputs Mouse Regions
413080
Chrome Controls Generic Controller Controls for the Chrome Browser. RUn in big picture mode for On-Screen-Keyboard support.