Looks really good! I think it would be useful if a two finger slide moved the cursor by word boundaries as opposed to speeding up the cursor. For example, in your video around the 1:00 mark, you two-finger swipe to get to the end of the line, but fall short by a couple of characters. If you moved by word boundary, then mistakes like this would be much less common. (I would suggest that when two finger swiping backwards, you move the cursor to the beginning of the previous word, and when swiping forwards you move the cursor to the end of the next word, much like how option left/right work in any Mac text area field).