Thanks for the input!
Actually while reading your comment i came up with new ways to use my idea for other Tetris variants. Like, let's ignore the scale thing for a minute, and just have the gameboard have different shapes. I certainly feel like there is still room for new Tetris versions to exist. Of course, the problem is that the original Tetris is simple and fun at the same time, thus most people prefer something simple. Any new version will just become a trend for a few weeks at best and then forgotten.
Hmmm...as for the visual clarity, i thought it was fine? I mean, the background(on one side) is black, the gameboard white, with borders to help make the difference even more clear. Do you have any suggestions to make it better?(of course it should remain black/white)
As the size of the playing field can't be changed(due to the way this tetris version works, essentially making the board twice as tall) i can't do anything against that. Except i have now added an auto-zoom function. It will zoom in now if it is possible. Thus if you keep the board even, the playing field size will remain large :)
The music loop was corrected, and i have made the game a tiny bit faster + only 15 lines per level + you can choose what level to start as well.