Hey thank you for your detailed review:
You can rotate the hand with Q and E to keep it upright, this not a bug but a feature! If your glass rotates too much it will empty.
I agree that voice acting would add to the atmosphere of the game.
As of now the game as it is, IS scripted. it's mostly on rails to tell a story. If we were to expand on it we would definitely add more choice to it. But for this jam we did not have time to pack in more content/decision based content.
Thanks for playing and leaving such a detailed review!