Just a generic-digital-USB gamepad, like this model for instance:
https://www.tiendatec.es/ocio-y-tiempo-libre/videojuegos/mandos/617-zone-evil-ze...
See? no brand on it, cheap and no analogue stick at all. :D
Better wait till the voting it's over, not sure if it's allowed to upload in-jam updates.
That will be not fair.