Nice concept. improvements might be:
iPad version - it looks fuzzy
Rotate - wont orient to use with smart cover
Strikethrough - allow backspace and strikethrough like a real manual. Letters that disappear when you backspace is cheating.
Fonts - or as they used to call them, typefaces...how about a variety ranging from this dirty old crappy machine to a nice clean crisp Hermes?
Tricefrench about miTypewriter, v2.0.0