Arcana

Level Select
At the title screen, press Down, Select, Select, X, Y, Select, Select, L, Rl, Select, Select, Left, Right, Up, and a button for the chapter you want to start on:
Chapter 2: A
Chapter 3: B
Chapter 4: X
Chapter 5: Y

Sound Test
At the title screen, simultaneously press and hold L and R. While holding, press B.