This is really interesting! I also suffered from the crashes others reported a few times; it seems like holding forward (and possibly other directions) while climbing the ladder will cause it on occasion? Not reliably, so there must be another factor, but it never happened when I wasn't holding a direction while climbing.
I really like the ambiguity of the good end, and the environmental storytelling of the bad end; it makes it very clear what happened without spelling anything out. I would absolutely love it if we got some more interesting sea life and an expanded gameplay loop; I hope you continue working on this and expanding it!