Seems like an interesting idea but, as you said, over-scoped. I highly recommend figuring out a basic gameplay loop you can complete in a day for a game jam, then expand on that so that you can get it done.
For example, in my game, I made sure to complete the ability to pick up and throw boxes and create a container to throw them into. Once that was complete, I could expand from there.
Don't be hard on yourself about not having art. That's fine. What's more important is clarity. Can the player know what stuff is? Text indicating what stuff is, controls, and other gameplay essentials will go a long way with art. You nicely color coded a few things in game just with circles, squares, and different colors.
Great job getting this submitted for the jam. Hopefully this'll just be another step towards you learning how to manage scope.