Here is the full list of all 12 Kumoon : Ballistic Physics Puzzle achievements.
Clear Tutorial-2 Without Firing a Shot
3 point Box
Completed the Multiplier Tutorial
Completed the Scoring Tutorial
Completed the Movement Tutorial
6 point Box
9 point Box
Completed Easy Levels
Completed Medium Levels
Completed Hard Levels
Clear the Pillars with One Shot
Clear Tutorial-3 with Maximum Possible Points