Nice concept, great execution.
Very good game, nice to have 30 levels but its a shame the last 5 or so levels were not challenging enough. There were some levels I feel you could have made slightly more difficult to complete, especially the speed based ones (and the last lvl could have been much harder!).
Other than that, I really enjoyed the concept and design. It's a very well thought-out game. The selection of music, in my opinion was very nice and in fact introduced cycerin to me.. who's stuff im starting to really enjoy.
Many thanks for the time and effort that went into making this great game, hope to see a second :)