*shakes hand* Truelly Exceptional
Panda... Star... you can imagine my reluctance to play this game a first. And having played in 9 times, I regret my initial thoughts.
Game play is very smooth and crisp; responsive controls and their simplicity make it one of the best I have had the honour of playing in a while. The randomized levels also mean that successive play through's are not repetitive (and more challenging; you can get to level 34 then bin it on level 7 as I did XD).
In particular, the strong point of this game was the art design. The background was beautifully designed; the layout of the score menus and the way they integrated their design into that of the game play justifies the amount of effort you have put in to this game.
The idea for the use of achievements was inspiring and gave a sense of success: you felt like you earned them (although, as other users have wrote, it would have been nice to know how to achieve them).
Oh, and congratulations for having a soundtrack that did not drive me crazy after 10 minutes. It certainly made the game more enjoyable. Also, kudos for the style of music chosen; ambient music is inspiring and helped gather the light hearted mood of the game. Plus, the obvious fact that it tied in well with the character of the game; to reiterate a point, good choice.
To summarize, this game is aesthetically pleasing, relaxing soundtrack and great game play; you, my friend, have just nailed how to make an excellent game. I've added this to my favorites, and I think everyone else should do also.