binary_prophet, this story is amazing. You have strong diction, style, etc., but this piece's strongest attribute is the way you've managed to pack in so much content into so few words. My old writing professor always told me that every sentence must accomplish one of two things: build character or convey action. This is obviously not as easy as at seems, and economy of words is the central goal of every serious writer. In this story, you've accomplished quite a bit in terms of character development as well as action, and I have to say that what you've left unsaid is equally well done. No time is wasted on the hows and whys of Keith's shrinking. Plenty of stories get caught in this problem, and I personally find it's oftentimes much better to just completely gloss over that bit of fantastic impossibility because it can never be explained.

If I had to pick on something, I guess it would be that Keith almost seems to be too aggressive in his pining. He oscillates multiple times between stuttering fearfulness to demanding rudeness, and I wonder if it's overdone. That being said, I only am critical about it at all because there's very little to be critical of in this piece for two reasons: a.) because it's short and b.) because it's really well done. I felt bad not leaving anything in the way of constructive criticism, though, so there you are.

Awesome story overall; hope for more!