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.
Completed a level without collecting any ambers.
Hit 3 enemies with one dash.
Defeated Frobos.
Completed a level in co-op.
Gathered all Coins on one level.
Unlocked a new skill.
Found a secret teleport.
Collected more than 100% of ambers in any level.
Completed a level without losing a heart.
Defeat Robos and collect his key part.
Defeat Octobos and collect his key part.
Defeat Cobos and collect his key part.
Defeat Calypso.
Gather every Coin in the game.
Complete one unlockable level.
Complete all unlockable levels.
Unlock all skills.
Find all secret teleports.
Make 4 enemies dance at once.