Complete Level 1: Kramer's Music Store
Complete Level 2: Stan Mikita's Donut Shop
Complete Level 3: The Gasworks
Complete Level 4: Suburbia and defeat Zantar The Gelatinous Cube that was mentioned in one line on the movie and rescue Garth
Collect every guitar powerup on the game in one playthrough
Collect 9 Schwings
Collect 9 lives
Defeat The Guitar Monster without taking damage
Defeat The Donut Monster without taking damage
Defeat The King without taking damage
Defeat Zantar, the Gelatinous Cube without taking damage
Complete Level 1: Kramer's Music Store without losing a life
Complete Level 2: Stan Mikita's Donut Shop without losing a life
Complete Level 3: The Gasworks without losing a life
Complete Level 4: Suburbia without losing a life