Here is the full list of all 20 Ball laB achievements.
Die 100 times
Die 200 times
Die 500 times
Die 1000 times
Die 2000 times
Die many times
Complete 10 levels
Complete 20 levels
Complete 30 levels
Complete 40 levels
Complete 50 levels
Complete 60 levels
Complete the game
Be crushed by a moving platform
Die 50 times
Die 20 times
Die 10 times
Complete level 1
Die the first time
Die in main menu