I ALSO got the void room glitch and also though it was intentional, haha! Was like ooh this is cool did I press a button to show me treasure? The combat was neat, I love the aesthetics, and I honestly would love to play this again when it's a little more polished. Controls were definitely janky and I had trouble getting to doors and places to go. However, With the strict time schedule and whatnot, I think you made a very good prototype of a game that I would totally be willing to watch out for to see how it develops if you work on it more!
EDIT: The first room was the one that turned black on me and showed me a bunch of treasure I dutifully ransacked. I don't know what I did but it was very shortly after I was spoken to at the start of the game if that helps. I may have pressed a button and was told I didn't need to use that now, but I am unsure.