To change items during a mission, hold TRIANGLE to open the list of items you have equipped. Use the D-pad to choose the desired item you want to use for the shortcut. The red side is for weapons, and the green side is for usable items such as potions, antidote, etc.
Unlock a gold star in the following chapters by performing the corresponding tasks:
CHAPTER - HOW TO UNLOCK Chapter 1 - Complete the chapter after defeating all enemies. Chapter 2 - Complete the chapter without taking any damage. Chapter 3 - Complete the chapter after breaking all lanterns. Chapter 4 - Complete the chapter without using Ninjutsu. Chapter 5 - Complete the chapter without any scrolls equipped. Chapter 6 - Complete the chapter without using healing items. Chapter 7 - Complete the chapter in under ten minutes. Chapter 8 - Complete the chapter without using attack items. Chapter 9 - Complete the chapter after defeating 50 enemies. Chapter 10 - Complete the chapter after defeating five enemies.