Here is the full list of all 19 Juju achievements.
Unlock a new skill.
Find a secret teleport.
Collect more than 100% of ambers in any level.
Gather all Coins on one level.
Defeat Frobos and collect his key part.
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 losing a heart.
Complete any level without collecting an amber.
Hit 3 enemies with one dash.
Make 4 enemies dance at once.