Geddit? It's a flash game! No really, its very good, play it!
The game is very atmospheric with the aesthetics and the music. Both are very suggestive that you are dead, although this remains ambiguous to the end. I found the later levels very challenging, and although you always return to the level you died in, it is still a tad frustrating. However a complete visual walkthrough is available on YouTube if you get board and want to see the ending.
It's a very short game, but I wholeheartedly recommend it as it is free. Even if it wasn't, I still think this is a good little innovative game, great fun for people who like a tricky platformer.