I really like the style! Seeing games made in GB Studio is a rare thing in game jams. Was kind of a new experience for me.
Playing in "the void" is a nice idea. Unfortunately I did not manage to move between rooms because at some point, the room I just left was loaded instantly again. So I was trapped between two rooms. That means that I did not encounter any enemies yet (the dialogue said that there will be enemies, right?).
I think with some bugfixing and some content, this could become a really nice game. Well done!