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 in co-op.
Defeated Calypso.
Completed all unlockable levels.
Defeated Cobos.
Gathered every Coin in the game.
Found all secret teleports.
Unlocked all skills.
Defeated Octobos.
Completed one unlockable level.
Defeated Robos.
Completed a level without collecting any ambers.
Defeated Frobos.
Unlocked a new skill.
Made 4 enemies dance at once.
Hit 3 enemies with one dash.
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.