Here is the full list of all 20 Cube Farmer - there are Puzzle achievements.
Finish level 40
Finish level 38
Finish level 35
Finish level 30
Finish level 25
Finish level 23
Finish level 20
Finish level 18
Reach level 16
Wait for it on level 3
Reach level 12
Finish level 10 with less movements
Finish Level 10
Finish level 8 with less movements
Wait for it on level 8
Reach Level 5
Reach Level 4
Finish Level 1
Wrong place