Love the simplicity. Nice background music. Solid game idea which has that one more go factor. Learning curve a little steep, first few levels really easy then a jump that might put people off - do you have any analytics to see where players are stopping to see if certain levels are game killers?

I'm not completely sold on the UI, Too much contrast with black and white and them some garish colours for text. Consider going more minimalist and subtle with you ui and colours - this would fit with the game style more and the chilled background music.

Try and strike a better deal with your audio guy. Having a simple text url link to his music site is not ideal on your game and does not help you ui look.

Good luck. I think you have something to work with here.