Haha I think gamepads are not supported in the web viewer. I believe if you had PICO-8 installed, you'd be able to run it from within that and then there'd be full gamepad support.
Hi , Thanks i did not know about pico-8 ! Crazy other planet to explore :) so instead of playing your game iam now learning how to make games in it :)
That's awesome! Let me know how it goes and if I can help, PICO-8's a lovely tool for getting into game development.