[snake_case]

There shouldn’t be any missing pieces and the puzzle engine has been tested thoroughly, so this is surprising to hear. Unfortunately I can’t investigate since demo puzzles are not persisted. Sorry about this! My theory is that it got lost far off screen and I need to prevent that from happening.

[natch]

As I tried pretty hard to make very clear, I scrolled around a lot, both the canvas and the assembled pieces, to rule out this possibility.

BTW, only tangentially related, I also tried pinch to zoom early on while solving (no joy) and I think it would be a nice feature.