Here is the full list of all 16 Matchsticks - there are Coffee Break Club achievements.
Complete one level in each theme
Unlock all achievements
Find a secret solution in level 57
Finish all levels
Complete 50 levels
Click on the matchbox 50 times
Complete 25 levels
Complete 15 consecutive levels without losing
Complete 10 levels
Complete one math level
Replay a completed level
Restart a level 5 times
Lose the same level 5 times
Lose the game once
Restart a level once
First level completed