Thanks! While I chose and settled on Lakka, it was the first thing I tried and it worked. It may not be the best option necessarily but you know, as the saying goes "if it's not broken, don't fix it" :) I might try getting my next game running on the Arcade1Up at some point, and I feel like it should be pretty easy. Famous last words!
Wishing you great success with your game dev ventures!
Best