This is not a game that is just Tetris with physics. It's about the colour combinations. The stones release their colour and white stones disappear. It's not about getting any rows full!!! Do you understand that?
I understand that: "The scoring system is very interesting" and I'm not saying this game is bad by any means, I tried to be as constructive as possible, and this is a great first project. I am not trying to start any arguments.