The creator's family enjoyed it, and that's great, but it's not going to become an indie hit any time soon.

Anyone who wants their game to be enjoyed by a lot of people is going to need to put in a lot of effort. It's basic competition really.

Skills that, unfortunately, are likely to become obsolete very soon.

Taking the logical conclusion of your argument - we should also be teaching our kids how to fashion stone tools, because by moving straight to machined tools they are also missing out on "actual" skills...

Ironically, a kid that does fashion a tool out of stone will learn the skill of toolmaking deeper (in some respects, all other things being equal) than a kid that doesn't. A few years ago I created my own computer out of logic chips, this taught me a heck of a lot as well about how computer hardware and low level software works under the hood, more so than most of my software engineer peers, but I am under no illusions that doing this was required to be productive in the modern conception of this role, or society at large...