Bit Dungeon is a dungeon crawler with 8-bit style graphics and mouse-only controls. Take the role of a knight and fight your way through a dungeon full of a monsters. Clear a room of monsters to reveal a key, which will allow you to unlock a door to an unexplored room. You'll also come across equipment and bonuses that will have an effect on your attributes. Your progress won't be saved until you reach a new level, which is accomplished when you defeat a boss.