I think the thing that's confusing people as far as tile placement is concerned is how to connect doors and how to determine what rooms contain. Your doors aren't clear enough for people to naturally understand them and line them up. For an idea of how to solve this issue, you can look at Betrayal at House on the Hill as an example.
Each door has a bright yellow rectangle, making it easier for players to see them and understand them. In addition, the square is labelled with a symbol (also bright yellow) and text describing its function. Using these tricks in your game will make it more functional.