At the most basic level, Linux means "Linux kernel", which you clearly don't have here. You can't run ELF files, you can't create processes, you can't load kernel modules, in fact the only things you can do are those that you directly emulated in JavaScript, which is a very different experience than interacting with a real Linux distro.

Your project has none of the capabilities that are very much expected when someone mentions "Linux", even in a broader sense.

In fact, I'm pretty sure your shell doesn't have some most basic abilities that a POSIX shell has (as another comment mentioned). See the manual page of e.g. dash shell and see what I'm talking about.

Emulating a shell can be fun, but it's clearly not the same as running an operating system. You should probably clarify that in the project README to avoid misinformation. Because otherwise, your project claims to be what it's obviously not.