It may seem impressive as how teenagers are able to script, build, etc, but for a lot of developers this is the norm.
Almost every single developer on this platform played this game when they were younger, and over time, they wondered and were inspired by developers which made their favourite games, that’s the reason as to why I got into building in the first place, because I saw what could be done and I gave it a shot.
Being young and developing is also really good practice, since when you’re an adult and move to another company, you know the basic principles of building/programming, etc. This is why it’s important to learn languages at a young age rather than an old age.