The second type doors for my game. These are the doors that lead to the Boss stage of the Fortress and Castle levels respectively. Since my game will allow for more exploration than other Mario games, I decided to play with the idea of needing to unlock the door first before fighting the boss. This meant making the lock on the doors a little more elaborate with a proper padlock and chains. I also imagine the doors having dark smoke seeping out of the cracks or something to give it a more ominous feeling. I'm pretty happy with these overall.