JavaScript, SCSS, KeyFrames e etc

Hello guys. This is my solution to this challenge. It was certainly the most challenging, not only for the calculator, but for all the implementations I did. Everything my crazy head thought of implementing, I managed to do.

The calculator is fully functional, including the keyboard and there is the option to turn the key sound on and off.

In the third theme of this challenge, there is something that will take you to a place in your memory. Can you make it to the end? Throughout the JavaScript project it was used a lot like setInterval, setTimeout, classList, getComputedStyle, addEventListener, removeEventListener and etc. I never imagined I could do something like this. I'm definitely going to refactor a lot, but I'm proud of the result. Any suggestion for improvement is always welcome. Hugs.