I have added some stuff that is major. I have added FLOORS!!!!!! Using the same type of code for the walls but a little different, we can get ourselves some floors. I also added a toggle to swap between adding floors and walls (that W button) and you can see the floors behind the walls in the grid. The floors are slightly optimized to disappear if they are far too. They also support darkness. NPCs also got some stuff done too. they can move toward the player (and phase through walls) and there can be multiple NPCs.