It's 100% possible to play with all the emulators running on the same computer. I worked my way through most of game with multiple players. There was a little bit of input lag but not too bad (and the game is pretty forgiving). If you have a couple friends who are into LoZ games I definitely recommend it.
We also just embraced screen-peeking as everything was up on the same screen for everyone to see.
It was definitely a bit of a pain to set up each time. Something like a batch script that automates setting the emulators to a known-good config, configuring the controls, opening up the emulators, and starting the game would be possible and would make it a lot easier.
We also just embraced screen-peeking as everything was up on the same screen for everyone to see.
https://i.imgur.com/pnhyEjS.png
It was definitely a bit of a pain to set up each time. Something like a batch script that automates setting the emulators to a known-good config, configuring the controls, opening up the emulators, and starting the game would be possible and would make it a lot easier.