I think maybe it would be better if the application showed any erroneously typed characters, rather than the correct characters in red. Or, if it's possible, to show some sort of visual juxtaposition between the two.
Also, I think maybe the font size should be a little bit larger, at least for the text around the position where the cursor is, if not for the whole text. Otherwise, nice application!
Also, I think maybe the font size should be a little bit larger, at least for the text around the position where the cursor is, if not for the whole text. Otherwise, nice application!