Zoom in on a scene. Objects that can be found in your immediate vicinity will appear as bold on the item list.
Objects
At times, identical objects will appear in different scenes. Usually those objects will have the exact appearance as in the last scene that they were in.
Points
Play a scene a few times in a row. Remember where the objects are located. If you can find them fast enough, you can earn time bonuses that will increase the points earned.
Stars
Stars are a pre-requisite for action scenes that will progress the storyline. The more you play a scene, the more points you must score to earn a star for that specific level. When selecting a level to play, note how many points are required in order to earn your next star. Consider playing a level with a low point requirement.