The idea of moving between the 2 camera's and changing the movement planes along with that as well is really fun and worked well for the most part! Especially in your last level (and during some parts of earlier levels) though, the '2' camera doesn't see much of anything and you've just got to try and remember where your plug is. I would have liked slightly bigger (and more difficult?) levels as well, but the concept for the game is great and this prototype definitely left me hungry for more.
I'm also always a fan of interactive main menus, so extra points for that!