Long loading times (although I didn't install it on my SSD).
If you click "Bonus" on the main menu, then click "Return", instead of just switching back to the original menu, it reloads the entire thing.
If you hit Tab to open the menu, then click "Reference", the "Remember something" button is cut off. I also got stuck in a loop, I kept hitting "More Options" and "Back to the Start", and it just looped over and over again.
There doesn't seem to be a way to re-read previous text, like most VNs. Maybe I just couldn't find it.
Q/E/R/F to rotate the camera instead of the mouse is a... unique choice. And it looks like you can see into other rooms by moving the camera in a certain way. I'm assuming this isn't intentional. This also happens while looking in the mirror.
The writing and dialogue is very good so far (although I did spot a few minor typos). The idea that the game's time limit is however long the players can survive without water is a very neat idea.
I am a HUGE fan of games like Zero Escape, Danganronpa, Ace Attorney, etc. This definitely seems promising. I'd like to wait until it's further along in development before I continue playing. Good luck!