I loved this game. The rules were really well defined and clear (and still I didn't get them in the beginning). I enjoyed that is really balanced, were sometimes low number values matter a lot.
The game is simple in a positive way, and the pieces movement is super smooth.
My only complain is the feeling sometimes is a but difficult to predict anything. As the last piece on top, you have 2 chances and if you put yourselves on the situation on depending on yellow and got purples twice... that was your risk! (Also my lack of statistics skills doesn't help on it :P)
My best game: