Thank you for purchasing my pack I am glad you enjoyed it.
The button animation comes with three behaviors, pressed, locked, and unlocked. You can check them inside the Aseprite file (need the Aseprite software) on the Tag names to see which one they are and what they do. Or you can check their names inside the Sprites folder too. The lock state has 2 types, locked and released, when you use them inside your engine, do not loop them but instead play it once so it will stay still at the last frame.