I can say that it's really well made! Controls feel great, animations and movements are smooth, and I'm a huge fan of the minimalist style you adopted.
I give just a negative note to the fact that the wrap to the next level is not visible since the beginning: I would have preferred it to be already visible (while locked), so I didn't have to go to activate it by myself and see where it is (I feel it may be a little but still frustrating time consumer for some players).
Overall, it's a really good game, and I'm looking forward to see (and replay) it finished!