This is great work. I hated the usability of both Vim and Emacs coming from a Windows background. I knew it could be more intuitive. You've definitely accomplished that. One problem I ran into is figuring out how to close current document but keep editor open. I didn't see it skimming help tutorial or help commands. In most editors, it's called "close" (with "quit" as separate option) or "new." I suggest adding that if the command doesn't exist or putting it in help near "save" and "quit" if it does exist.