The inside of the cave seemed normal enough as you took shelter, but the rear wall was made of metal. Intrigued, you elected to spend the night, but were shocked to discover the metal wall had opened much like a door that slid in and out of the walls. Figuring to take a quick look around, you became trapped as the door slid closed behind you. Now, you have found yourself running for your life, hiding from the metal golems and ravenous plant creatures inhabiting this place.
From deep within the caves you can hear sounds that remind you of forest life, but the only plants that you have found have either tried to eat you or have infested entire hallways with their choking vines. Teh only luck you have had was in finding a yellow glass pane, which you discovered that can be used to open some of the doors of the complex. By mistake, you also found that it works on black doors, but have not yet tried it on any other color.
Black, brown, yellow, orange, red and violet and grey seem to be all of the colors, at least on this level and part way down mine shaft you investigated when you first came in, but nothing you have found gives you any idea on how to get the exit doors to reopen.
Now, your luck seems to have truly changed. The golems led a group of men(!) into one of their strongholds. As you contemplated how to join up with them, a buzzing sound has started sounding, and along the corridors red lights have begun flashing. You watch as one of the golems glides across the floor to re-enter their head quarters. A short time later, you see a second approaching as well.