As mentioned in another comment, I am planning to add a C/C++ interpreter and I have put GNUstep in there, so that people can easily build their sprite editors and other game dev tools :-)
And it illustrates perfectly why what I am doing is cool.
I played that game in the browser and it looks great.
But the controls are quite a bit laggy.
That is not the developer's fault, they cannot do much about it. The medium that they chose is not designed for low latency.
My project enables developers to make a game like that more fun when you actually play it.
[0]: https://www.lexaloffle.com/pico-8.php?page=faq
[1]: https://github.com/ftsf/nico