D&D General Help Making a Puzzle Room

[Grogg of the North]

This is on Roll20, so I have no idea how I could do that. Especially given how little control it permits players to have over moving or controlling things besides their own token.

You could create a deck of cards in roll 20 with the images for the passageway. Deal the cards to the players and have them drop them down onto the virtual table top. Unfortunately, Roll20 is a bit of a pain when it comes to uploading multiples of the same card. Want ten straight paths? Upload it ten times. There's no way to duplicate it as far as I know. It would require some work on your end to make this idea work. Sorry.