Crystal Crisis embargo has been lifted. I have it a 5/10 because I couldn't cope with the fact that I never felt in control of the game like I do with Tetris and Puyo Puyo, but many other reviewers seem to like the game with dealing it about 7-8 of 10.
What I mean is that you can't pop your crystals when you want to because you need som randomly generated spark crystals to do so, while in Tetris you can almost always remove a line and use your skills to remove the lines, and the same in Puyo Puyo. This frustrated me in CC. Then Timed Crystals thrown by your opponent cannot be used for a few rounds and this can make it impossible to recover even if you get the Crystals you need.
Furthermore, the crossover is totally needless and only used as a skin. Peel that off, and you have what is essentially a mobile game priced at 40 euros.
Edit: sorry, perhaps it's 30 euros.