Great 3D puzzle blend
The 3D is beautiful. I know making 3D is hard, let along making a puzzle that depends on it. It does get pretty hard pretty fast, but a fitting word to describe that is that it's "puzzling".
I like that no textures were used in order to keep it simple and maintain good performance. The simplicity of the interface makes it very easy to play.
Overall it's a smooth, challenging, and very intuitive puzzle game.