Hey ! I saw your video some days ago but forgot to comment.
Your video made me laugh :)
The fact there's no walls, it's because it's supposed to be a "dream sequence" (maybe ? hehe)
Shame, at the end, the last level before the cinematic you missed a little something through the window ;)
Your interpretation at the end was really interesting !
The game is actually a representation of trying to escape problems by moving out again and again. It will always be there with you if you don't try to solve these.
Thanks for playing !