Here is the full list of all 19 Juju achievements.
Defeat Frobos and collect his key part.
Hit 3 enemies with one dash.
Unlock a new skill.
Find a secret teleport.
Complete any level without losing a heart.
Gather all Coins on one level.
Collect more than 100% of ambers in any level.
Defeat Robos and collect his key part.
Defeat Octobos and collect his key part.
Defeat Cobos and collect his key part.
Defeat Calypso.
Complete a level in co-op.
Gather every Coin in the game.
Complete one unlockable level.
Complete all unlockable levels.
Unlock all skills.
Find all secret teleports.
Complete any level without collecting an amber.
Make 4 enemies dance at once.