Thanks for giving the game a shot!
Since the time is rather limited to diffuse the bomb, we purposely made the detective move a bit fast so that the time wont be wasted in moving around. Sorry that you felt it too fast.
Also in the green shapes puzzle room, the clue indicates the shapes, which are drawn on the wall, rather than furniture. In this room, as written in the clue on the sticky note on the floor, the count of each shape painted on the wall is important and leads to combination. If you get time, please have one more look :)