thanks for the detailed response. You might be right about the save - it’s possible I never actually locked in the last piece on the level that I had to replay.
It might be interesting to be able to shelve pieces by dropping them outside the puzzle but I assume that’s not compatible with larger puzzle sizes.
the one-cart pico-8 web build for my game is here: https://stickychunks.fun/classic/
it’s more complete than the rewrite in progress but I got tired of dealing with token limits, gzip limits, controls limitations and such so I started from scratch in Raylib & C++. I’m in a similar boat where pico-8 limitations forced me to finish the game sooner and now that I’m unchained I am spending forever on polishing this new version.