This is an emulator tool called Project Nested and v1.3 was recently released. Great for SNES Everdrive owners or for anyone that wants to see emulation that was never thought possible.
It creates working SNES roms by patching NES roms with the emulator program. The new update has increased the list of working games and fixed other issues. It doesn't run all NES games perfectly but the progress so far is very impressive.
The list of compatible games has grown with the new update. It runs Super Mario Bros. 1, Legend of Zelda, Donkey Kong and Tetris very well and there are many others.
I'll put the link below to download the program and for the further info. The page includes a link to a compatibility spreadsheet too. This is essential for entering the correct program settings and includes patch code (if required). https://github.com/Myself086/Project-Nested
The first spreadsheet tab (Summary) shows the compatibility colour scheme. It's important to know which colours relate to compatibility before delving into creating any roms to play.
The game list and settings for the program are on the second spreadsheet tab. The tabs will appear on the top or bottom, depending what you're viewing it in.
Follow the instructions on the compatibility sheet. Patch code is in field E, which doesn't appear on screen unless you scroll right.
Supporting the developer:
Myself086 has now set up a Patreon pagehttps://www.patreon.com/Myself086