thank you lots! i'm glad you enjoyed the squishy things and how they play
as for how line clear works, i knew i wanted to make it so pieces only clear their individual squares. i got this idea from butsuris actually (still wild to me you know what it is by the way), having residue be polyominoes instead of arbitrary shapes felt easier both to play and to code. and because of that, i made is so that instead of checking discrete sectors for how full they are, the game instead just keeps track of the center position of each of those blocks, and if enough of them are close enough vertically then they must be lined up and clear. this allows lines to be cleared anywhere, but would make it hard to implement some kind of "fullness" indicator... maybe i can come up with something later on for a full release?
speaking of full release, there were a few ideas to expand on the game that ultimately didn't make it, like a loose campaign to unlock new piece colours, an endless mode, maybe a puzzle mode too where line clears are disabled to give the true softbody tetris animation experience... maybe not much in terms of bigger board though because ouch my framerate lmfao, but hopefully that's something to look forward to