0.6.1 / 10-12-2019
Nin is a Nintendo Entertainement System / Famicom emulator that is in the early stages but is actively being developped.
It's not very polished on the UX side, but can run many games without issues and has gamepad support.
The exact mapping will depend on the vendor's layout. On a keyboard, the arrows are mapped to the NES D-Pad, Space is Select, Enter is Start, Z is A and X is B. Multiple controllers or other kinds of controller are not currently supported.