Ok, it took me a minute to figure out how the game worked, but it's actually a really unique concept. I can't say I know may games of the top of my head with a similar idea. That being said, it's really difficult, and, with no tutorial, it was even harder to figure out what my objective was when I would die on the third or fourth block. I would add some text or something to tell the player the rules, or just make it a good bit easier and have it go the progressively speed up route. Interesting concept, very early execution, obviously, so I'll say it's a pretty good start and with some tweaks here and there it has potential to be a really good mobile or flash game. I can see this being a very successful mobile game especially. During it's final stages, when you crispen up the visuals by adding actual sprites and UI and implement adds every few deaths, could see it being pretty successful.