Great game! I wish there were some more levels to it, and the rope seems to pull on the player in a way that isn't super intuitive. I think with a bit more time fine tuning the rope controls this has some potential for a really fun core mechanic.
I'm afraid I'm not getting much of the theme though. The "end" comes through clear with the "end" of the rope, but the "beginning" isn't really shining through in a novel way. Maybe do something with the other end of the rope, or have the goal be the beginning of the rope rather than a key box.
The graphics and sound were great, and I had fun!