These are the first set of ideas that I've come up with after doing research and taking down notes. I tried to incorporate multiple floors since you said to think vertical, as well as different settings. There's some prop design too because I feel the Machine that's going to hold the ghosts is going to be important and I might have to think about designing the environment around the machine. Tell me if you have any comments and if I'm approaching this correctly, I'm not sure if I should also thumbnail the outside of the HQ to help out invision the interior. Thanks!