Epic
This is perhaps the most interesting flash game I have ever played.
The style is really creepy; the graphics, the music and the dialogue.
The story is really deep and unique, and is open to a lot of different interpretations, though I'd probably hurt my head thinking about that too much.
I'm not usually into puzzle games, but despite that I kept playing and went on to beat most of the levels without a walkthrough, and it's definitely more entertaining than similar games such as Shift.
The ability to share levels adds endless replayability, and although I haven't got that 333 levels medal yet, I eventually will.
Congratz on a really intriguing masterpiece.