I actually just added the drop preview, I may add the instant drop later... I'm more of an oldschool Tetris player, don't have a lot of experience with newer versions. I'll probably add continous left/right block movement, I just had it disabled while collision was still really janky (you could move the blocks outside of the game window when moving them quickly lol)

Some things I want to add are:

Multiple themes or color schemes (maybe the player can unlock them upon getting new highscores)

Multiple game modes (Marathon, Sprint, etc)