Hmm, this is interesting. Pretty visuals, atmospheric sounds, lore and plot are intriguing. A few suggestions
1. Some directions about where are you going, like room names when you point at the door, and arrows where you can click to go in corridors. The character is supposed to know at least part of the place layout and not searching the place by trial and error.
2. The crystal imprinting minigame was WAY too unclear, I had to look the walkthrough to understand what to do.
Other than that, the game is really good