Maybe it should be.

StarCraft would not be so hard to make. But nobody did that, even though 0 AD exists to clone age of empires 2

It even works as a 2D game so no modeling experience necessary

I run it in Firefox, though

Open source language learning only has Anki. Everything else is in an enbryonic stage.

There are so many low hanging fruits. Add-on to look up words in subtitles and add it to Anki. Luo dingo clone that’s a bit less tedious (without having to write so much of your native language). Clozemaster clone (unless someone knows how to set up Anki to do this)