Here is the full list of all 14 Mojito the Cat achievements.
Pick 50 Yarn Balls
Pick 100 Yarn Balls
Get 20 golden cubes from world 0
Pick 10 Yarn Balls
Unlock World 0
Find all Bull Letters
Find all Shark Letters
Complete 50% of the game
Complete 100% of the game
Get 20 golden cubes from world 1
Get 20 golden cubes from world 2
Get 20 golden cubes from world 3
Get 20 golden cubes from world 4
Get 3/3 Golden cubes in 60 levels