Here is the full list of all 24 Small Ball achievements.
Complete level 7
Complete level 14
Complete level 21
Complete level 28
Complete level 35
Complete level 42
stars reach 21
stars reach 42
stars reach 63
stars reach 84
stars reach 105
stars reach 126
color scene score reach 40
color scene score reach 50
color scene score reach 60
typing scene score reach 55
typing scene score reach 65
typing scene score reach 75
math scene score reach 20
math scene score reach 25
math scene score reach 30
avoid scene score reach 60
avoid scene score reach 70
avoid scene score reach 80