Thank you for your work, @egordorichev!
Needed a "pressed" version of these for some tutorial gifs, so I made one.
.ase file includes pressed state on frame 2.
Both keys.ase and keys.png were modified to include "unpressed" mouse and controller buttons.
keys.ase: https://drive.google.com/file/d/1nItbJ7buPGoKyDqGYvr26iJBiWwACuqC
keys.png: https://drive.google.com/file/d/1pcOsY1934k6Ft0cIl61STObpCXWghk5d
keys_pressed.png: https://drive.google.com/file/d/1gjWDKaPc3UGMfoaDSePruXrubIfrfpsG
