Oooh! While I was playing I was inadvertently comparing it a bit to Lethal Company, because of the visuals and general vibe, so the thought of multiplayer did cross my mind and I thought it could be quite fun, so I'm glad that's something you're considering! I think maybe there could be some huge anomalies with multiple signals that you need to fix, and then having more players do it at the same time could make it more worthwhile or something like that.
Also maybe the theme would've reached me more if I played more to be fair, I only did 2 runs.
Oh also also, since you are planning on continuing the game I should probably mention that
1. The door in the little model of the mansion can be interacted with and it does end your day, that's how I lost my first run
and 2. I was pressing E a lot to escape on my next run and when I came back it skipped through multiple days.
But yeah I hope you good luck in making the post-jam version and I'll definitely check it out if it has multiplayer :D