Ahhhh...you are playing the new version...

My high score is 9420 - I made it to level 16. This new version is, in my opinion, all about staying alive as long as possible. And it is not easy. Level 15, which is very similar to level 6 in the old version, can actually be very challenging. Good luck, and keep us updated on your high score - I expect you will break 10,000 shortly!