This app was mentioned in 5 comments, with an average of 1.00 upvote
I know its a bit expensive, but you'll really like the moga pro power.
To be honest, I've never heard of SuperRetro16 - but, look at those play store stats: over 1M installs of the paid app and overwhelming 5 star reviews; that's unbelievable. You're starting to convince me to buy it. And, hey - there's a free version you can try out.
Super retro is the best emulator I've used https://play.google.com/store/apps/details?id=com.bubblezapgames.supergnes_lite https://imgur.com/dIddBVXexample of the layout runs smooth
It auto downloaded the game box art and Lists them on a shelf