I'm using chrome, and on the 7th puzzle, there were some major glitches. I pulled one piece out, and as I tried to move any other piece, they began to move rapidly back and forth so long as I continued to attempt to drag them. When I stopped, it resulted in them being graphically locked within one another, such that the original layout of the puzzle is indeterminable, and thus the puzzle was unsolvable. Until serious issues like this are fixed, I simply cannot rate this game highly. Interesting concept, pleasant music, but incomplete. I also agree with the comments stating the extreme precision can be frustrating at times. When I clearly see the solution and have to spend three minutes aligning the holes such that there's no collision, it just frustrates me, instead of providing an intelligent and engaging challenge.