Sounds like a classic case of environment shaping behavior. Keep the key exits visible but not obvious, and place the little obstacles so they create a sense of choice—people will gravitate toward the path that feels easiest until you lure them into a trap. Map out the likely routes in advance, then insert a subtle cue at the first bend that nudges them down the corridor you want. The lamp shadows can serve as a warning or a lure depending on how you light them. Remember, you want their first move to feel natural; the second, a calculated step into the frame you set. Keep the flow predictable but the outcome surprising.