Congrats on your first game and first jam! That's a big achievement in itself! This plays a little more like a hack-and-slash than a roguelike, but I like your idea to have environmental effects to add challenge to gameplay and add a little variation from room to room. Coming up with cool ideas that are add something little different to gameplay is exactly how to think about how to do something new that will help people get interested in your game. Keep at it!