game-editor.com

What is the deal on uploading fonts? I upload some Korean character .ttf fonts but they don't work when I type in the text box.

That's because gE currently doesn't support unicode, and therefore only accepts characters it can render, even if your ttf can render others.

So how can I type using Korean script?

The only way is to use images. You can create a bmp font with a bunch of korean characters, and display them through very weird characters. But, that is extremely inconvenient and probably can't display enough of the language. The only other option is to use animations for any text you want.