Here is the full list of all 19 JUJU achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Hit 3 enemies with one dash.
Defeated Frobos.
Unlocked a new skill.
Found a secret teleport.
Completed a level without losing a heart.
Collected more than 100% of ambers in any level.
Gathered all Coins on one 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.