A rhythm-puzzle game? Turba sounded really neat when I first saw it. I was itching to try it out. However, I was sadly disappointed.
The #1 thing that destroys this game is its abysmal beat detection. Because the rhythm of the song determines how fast the blocks spawn/move and allows you to get "beat bonuses" for clearing blocks to the beat of the song, it's a key component of the game. Unfortunately, the game often skips beats and detects beats when there are none, completely disrupting the flow of play.
A few of the other game mechanics seem a bit off as well. "Beat blocks" are supposed to turn all surrounding blocks black after they count down and explode, but there has been at least one instance of a block being left out of an explosion. As far as I can tell, there is very little discernable difference from the three difficulty levels, and it's possible to play songs that are impossible to lose on, even on the hardest difficulty.
If Turba offered custom BPM and beat offset settings per song (features other software is quite easily able to do), this game would probably be redeemable. But with the main mechanic of the game broken, it's hardly worth spending your money on.