a couple suggestions on the controls:
there is a bug where occasionally when you press left/right, it moves your piece twice. this can cause to misdrop very easily when you're trying to go fast.
I also would suggest raising the speed at which pieces move to the left/right when the button is held, right now it is fairly slow and when the game gets to high speed I have to mash left/right to get the pieces to go fast enough. If that's how you want the game to play at high speed that's fine, just my suggestion.
Other than those bugs and stuff, all the different versions of this have been great! They're all creative concepts that lead to an interesting take on [unnamed block game].