This is great, you may want to look at getting this to run on retro gaming handheld consoles such as r/Bittboy r/RG350/ r/SBCGaming.. I could definitely see me playing with a friend on a retro console with the multiplayer feature. Not sure if they have wireless capabilities, yet an interesting project nonetheless, thanks for the write up.
Those handheld consoles are different ecology. But with cloudretro you can run it on mobile browser. It offers the same comfortability (Unless you like the feeling of button and widescreen :D )