Thanks for the positive feedback guys. We've decided we want to give it a go and try to develop the game. It'll take a large amount of time though seeing we're going to have to develop the game in our spare time.
Really nice concept and idea! Also, very immersive atmosphere.
1) the more complex puzzle should not become huge trial and error loops. For example, solving it should come more from thinking about a solution than from finding the exact spot of some stick on the grid.
2) the complex puzzles should also integrate the shadow concept at its core.
I completely agree on those two, and I would add:
3) The transition between front and backstage, although nicely done, is a bit slow as it is now, and with complex puzzles could break the game play flow.
Aside from this, good luck and keep up the good work!

Hehe, that sounds familiar. Initially, we literally rotated the camera from one side of the screen to the other with a nice swoosh, which frankly looked awesome. Though it was painstakingly slow so we had to leave it out.
Anyways, we haven't really had alot of time to tweak things to perfection yet, but I'll see to it we might chop a fraction of the time off to make it even smoother

Thanks again for taking your time to respond.