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