This is my favourite entry so far.
Really nice visuals and an interesting concept - I like the balance between the visitor and human requirements a lot.
I did encounter a bug where to rotate I had to hold left click, then right click, then let go of left click, then right click again and only after doing all that did the piece rotate once and then also drop to the floor so rotating a couple of times was a bit wonky.
But everything else was really great, good job!