Big thanks for the detailed review! I'll address everything you mentioned:
I believe it's the friendlyneighbour.png you're referring, yes, I caught just before submitting it for the game jam, haven't seen the error pop again, hopefully it's fixed.
The whole sentinel section is a bit vague, I agree completely. It's a common feedback I've seen, so it's definitely one of the priorities. I added to the main page some tips for it as a lifeline while I wait for the jam to be over to update the game. The "take snapshot" bug I believe it's contained to the low decks and it has been identified and corrected for next release. Sorry for the inconvenience!
As for the ESC key, I think the engine takes it in the same value as Right Click for cancel. I didn't want to completely kill keyboard support as I do intend to add a sort of 'hotkey' support, like computers of old, so it's likely some keys have functionality here and there that's not reported on screen as a leftover.
The Bad Ending does not count towards the endings (so, technically, there's three), it's essentially a game over screen. If you managed to visit the low deck, you're already on path for ending two, you just got to listen to the audiologs when you get back to your main interface. It isn't vey intuitive, as it's the only part where audiologs are a thing, definitely another priority to fix.
I did wanted the player to feel less constrained on what they could do to push for a more 'explorative' pattern, but given the limited playtesting cycle I had, it was bound to have a lot of hiccups. This last week has been very productive to reshape my approach and I'm confident I can fix the "what do I do" moments now that I've been able to see more people interact with it!
Again, huge thanks for taking the time to comment, and I'm very glad you enjoyed it in spite of its shortcomings! Hopefully you come back for ending two, as it kinda explain what's going on haha. Though some sound effects got lost in the upload, so prepare for some definitely intended silent parts.