Here is the full list of all 31 Rhythm Sprout: Sick Beats & Bad Sweets achievements.
Got all achievements in Rhythm Sprout!
Get 25 CDs.
Clear 10 Levels in Turbo Mode.
Clear 5 Levels in Mirror Mode.
Clear 5 Levels in Random Mode.
Get to the finish line with every unlockable skin.
Die several times in a row.
Answered YES on every question at least once.
Answered NO on every question at least once.
Be very interested in Sugar Daddy's story.
Rewatched a cutscene multiple times.
Clear All Bonus Levels.
Finish the Side Story.
Defeat Mrs. Chili.
Defeat The Power Peppers.
Your love of trap doors knows no bounds.
Finish the Main Story.
Get one of the Target Scores in any level (no more, no less).
Defeat K-FLOW.
Hit 20 Trap Notes in one level.
Get 100 Stars.
"Defeat" King Sugar Daddy.
Get 10 CDs.
Defeat Candy Mama.
Listen to the same loop over and over again.
Wear an unlockable skin for multiple levels.
Get 50 Stars.
Defeat Count Arelle.
Fall through Count Arelle's trap door.
Get your first CD.
Cleared the first level.