Nice puzzle game and great first game. I had some graphical issues so I downloaded the source code and played it on the Mobile renderer. Thus I can't give much feedback on the graphics, but they look good from the screenshots.
The atmoshere is well done and the 3D assets and sprites are really good too. My main problem is that I did not understand the scoring system. I won the first two matches but lost the third with 59 points out of 60.
Also, it's a smaller issue but the button mappings felt strange to me. Rotate is the most common action after navigation, but is mapped to Shift instead of Q or E that are right next to WASD. Or cancel is E instead of the more obvious Escape. These are just suggestion that you can disregard in the name of innovation, but I think it's good to follow common button layouts and consider rules like the frequency of actions and key presses.