I don't know how to read Hangul (I know the general idea about how the character is composed). To me just looking at the examples, it doesn't seem as obvious what the structure of the code is, compared to Latin letters and punctuation. Actually, most punctuation looked OK, but the first couple of examples used arrays and [ and ] seemed to just blend in with the identifiers wherever they appeared. I'm not sure how distinct they look with familiarity with Hangul characters. I'm sure it's also nothing that colour syntax highlighting wouldn't make easier.

Fair point that [ ] can blend in.

For Korean readers the character systems look quite different, but I can see how it's hard to parse visually without familiarity.

As you said, syntax highlighting helps a lot — there's a colored screenshot at the top of the README showing how it looks in practice.