Here is the full list of all 14 Ladder Larry achievements.
Complete level 1 in under 30 seconds
Complete level 2 in under 30 seconds
Complete level 3 in under 30 seconds
No loss of life in the first 5 levels
Complete the first 10 levels
Complete the first 20 levels
Complete the first 30 levels
Complete all 40 levels
Glue your first ghost to the floor
Bomb your first ghost
Kill your first ghost using a mine
Use a pillow for the first time
Take out 2 ghosts with one bomb
Take out 3 ghosts with one bomb