For a demo, this is pretty damn solid!
Usually, I'm not a logic person, the antithesis of Spock. However, the puzzles on this game are difficult enough to be a challenge, but not enough to make one rage.
The graphics are great, the music and sound effects as well. The controls... well, it's point and click, not much to talk about. The gameplay, as described above, allows enough of a difficulty curve to get the hang of things without hitting a brick wall.
I'm definitely supporting this on Steam Greenlight. I can tell this game is going to go places if it gets in the right hands! Good work, can't wait to see the final product!