Hey ;)
Good stuff. I love things that use boundary or play area in a creative way. One of the problems is that you have to either stay in one place or if moving from one to another, limit/alter boundary, so each place does not look exactly the same when it comes to the size. Hm. Even putting a door in the middle could work.
Do you have any ideas or plans what to do with it? I'd love to see more :)