Try to gather as many bombs and treasures as you can while proceeding to the exit. The exit will lead to your next challenge, which could be another passage or a Royal Palace room.

Bombs	Bombs come in 100-point and 200-point varieties. Grabbing a bomb adds the corresponding amount of points to your score.
Treasure Chests	Jump on top of these to open them and take the items inside. Treasure chests come in two varieties, red and orange. The orange ones can only be opened if you have your Mighty Power activated. Always keep an eye out for treasure chests, as they can be hidden in all sorts of places.