Here is the full list of all 15 Keyboard Killers achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
100000 KILLS
25000 KILLS
9999 KILLS
Click End
Click Tutorial
Change Music Vol
Quit the game
Click Backspace
Kill 1111 meteors in 1 lvl
666 KILLS
Click MainMenu
Accuracy 100%
Click Undo
Click Pause
Click Enter