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