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
Change Music Vol
Accuracy 100%
Click Enter
Click Tutorial
Click End
Kill 1111 meteors in 1 lvl
Quit the game
666 KILLS
Click Undo
Click MainMenu
Click Backspace
Click Pause