I think this game has a really interesting concept and the soundtrack matches well. However, the longer I played it, the more I was getting stressed as the soundtrack looped.
In terms of gameplay, I felt the the sensitivity of the rocks colliding with one another was a little too high. My base block felt like it was constantly glitching whenever I try to stack my second one. This made it really frustrating.
I feel like the game would benefit more with some hints/suggestions to what pieces may fit well together. Perhaps something like illuminating sides that fit together. This would definitely help the longevity of players continuing and repeat plays as there would be give a gratifying satisfaction.