This. game. was. excellent.
A great combination of fantastic visuals (love the low-poly, it's really well done! The colour palette is cool too, nice and calm), calming music (I like the synth + chimes), and clever addition of cards to augment gameplay.
My only feedback is that a little tutorial would be nice (I didn't realize the move limit, otherwise everything is pretty self-explanatory, other than the cards perhaps, due to including controls in the UI--good idea by the way). And perhaps some of the level design/order the levels are in could be looked at (the levels were usually quite satisfying to complete, but sometimes were a bit too hard/easy).
Oh--and thank you so much for the ability to rotate the camera! (also thanks for the Mac download.)