I thought the basic idea was really cool and creative, but I really wished there was an undo function - on some of the longer levels I felt good about making progress on one part, only to realize that I had trapped some people in a different part, which was a little frustrating. In general, the game seems to reward trial and error to discover configurations that work, and I enjoyed that aspect, but I didn't enjoy having to restart from the beginning every time I got stuck (I eventually gave up on the 5th or 6th level I think).

Overall, this was a really interesting idea and I could see this being an awesome puzzle game with a few tweaks!