Nice gravity based puzzle game. It was quite relaxing to play and an interesting idea. Couple of suggestions:
1. Make it left click only? Perhaps by adding icons for the button presses, and removing the right click system which I found a bit fiddly. Then it would be touch friendly, and also wouldn't need the forward/back browser fix.
2. I got up to stage 10, the level looked a bit too tricky at that point, I had a couple of goes but was so far off I gave up. I wonder whether it would be worth opening up new mechanics before making the challenge too hard on levels? Perhaps the levels could be rearranged? Or maybe the "complete the level to open the next one" system could be loosened up a bit?
But overall very nice puzzle game.