The game idea is good. The mood and the visuals are also good.
I didn't realize that I can stack hexagons at the very end. I didn't see anywhere mentioned it, I read the tips about height, but I didn't get that I had to stack pieces.
Also the camera doesn't have limits and you can zoom out too far, or zoom in and pass through the hexagons. Another detail to improve the experience is that is hard to see when you cannot put a cell.
A part of this minor things, I like the game ( score: 224)