Cool game! Even if it’s not finished, it was a great idea to submit it.
You need to prioritize what’s important — do we really need a main menu?
When you have teammates, sure, but when you’re working solo, it’s better to focus only on the gameplay.
Don’t forget you’re targeting players who try out jam games; you can even explain the controls in the description.
Try to get a full gameplay loop working first!
The immersive experience is a success, it would have been a really good game if it was finished for sure.