Hi! Thanks for playing the game! I'm glad that you seem to have enjoyed the game.
As for some of your questions:
- For the crystals, as you have guessed, they are indeed from the dead fetuses/babies. The way I intended it is that the crystals are products of those babies dying; although since I never explicitly narrated it and only hinted stuffs through the worldbuilding, whatever interpretations that make sense are valid.
- Regarding the ghost, I didn't go into detail indeed, and the only thing revealed is her saying "Hi Mommy". I definitely had various intentions regarding the ghost as I was building the game, but in the end I decided to only reveal it as the ghost that claimed to be Saki's daughter.
- As for endings, yes there is only one ending. I didn't have enough time to code for more endings XD
And wow nice this is the second time a gameplay of my game got uploaded to YouTube! I'm so glad I actually made something quite decent this time (unlike last time where I cut way too many corners XP)