Feedback to the developer of @WriteforMac

HI! I've got some feedback I'd like to provide, but you guys don't seem to have a Twitter account that I can find.

First, your website:

Add a link to your Twitter account.
If you don't have a Twitter account, get a Twitter account. :P

Onwards to the meat; your app:

When entering ‘typewriter mode’ with a document already open, the visible position in the document won't immediately follow your cursor; this starts working after you start typing. It's possible to get your editing cursor (confusingly) stuck at the bottom of the document, invisible, while your viewpoint is locked to the top of the document.
The ‘width’ settings for Fullscreen should refer to the same width regardless of the size of the screen. They should be defined in columns-of-characters (or approximations thereof), instead of in the screen-size. (The accepted practice, backed by the science of how humans read text, is around ~2.5 alphabets-per-line, or ~65 of the lowercase letter ‘m’.) I suggest, perhaps, 45em, 65em, and 100em?
When in Fullscreen, there's no obvious way to exit Fullscreen (although it turns out the esc key works.) Ideally, Write windows should work the same way as most other native Fullscreen apps: moving the mouse to the top of the screen displays the title-bar, which has a leave-fullscreen button on the far left:
The tab key behaves very strangely. I'm not sure how you're intending for it to function; but I seem to get a different visual appearance when I hit the tab key, than when I hit the spacebar the appropriate number of times. (In a monospace typeface, the first character after a ‘tab’ key-press doesn't quite line up with any of the columns of the line above.)
This may be subjective; but I think the lack of a right-edge border on the file listing looks very strange:
Similarly subjective, but: Perhaps the ‘search’ field shouldn't be shown unless the user scrolls up, or hits ⌘F, or something? It seems out-of-place, visually.
When ‘Correct spelling automatically’ is enabled, the user's setting for ‘Check grammar with spelling’ is ignored. (I don't care about the machine's grammar opinions, but I nonetheless get slathered with green underlines when I have ‘correct spelling automatically’ enabled.)
‘Set as default client’ should probably be an action-button, not a toggleable checkbox.

Finally, some Markdown-handling concerns:

When adding a single newline inside a list item (i.e. continuing a paragraph within a list item), there's some sort of auto-indentation functionality … but it indents to the start of the list-item marker, instead of the list-item content. For instance:
```
 *  This line wraps,
 to here.

  * and this one,
  to here!
```
… instead of
```
 *  This line wraps,
    to here.

  * and this one,
    to here!
```
This is patently incorrect, and very annoying to constantly correct when editing text. )=

My e-mail: <snip>
My Twitter: <snip>

ELLIOTTCABLE/gist:b96ea7ebf1cf41bea135