Creating a cute single-element toggle switch

Check the source code and live demo at: codepen.io/alv...
The design was inspired by Heath Taskis' CSS Toggle - Dead Or Alive: dribbble.com/s...
Note: animating background positions is not efficient, I do as part of a small component for this demo, but it is not a good idea to do it at a large scale.
Music: Bensound.com/royalty-free-music
License code: 3HWQ89WBBJMFNLYP