I totally agree. The plan was to have several items in the game that allow you to get info on where the ghost is, and more items in a room make it easier to locate. Future updates will quickly bring more items, but for now the cameras are the only tool. Because I cant update the game during the jam's review period, I'll do a write up in the games description explaining how to play with just the camera. I'll give a quick explanation here so you don't have to search around.
Pressing E on the monitor cycles through cameras, even if they aren't active. the screen will remain black if a camera isn't on. to turn a camera on, press left mouse while holding it. Active cameras make the ghost angry, if it stops in a room with active cameras, it can become angry and hunt. With the way things are currently, the game is extremely difficult as finding the ghost with just the cameras is hard. The environment is dark, and the ghost only shows up as a dark figure on camera. The camera's current FOV makes it very difficult to see an entire room. These things will improve in future updates.
Thanks for your feedback!