One thing bothers me about this: The codes for punctuation are not pneumatic. This is easily fixed. The association between punctuation and letters/numbers should be changed to be:
based on the following phlegmatic code: At Brace CloseCurly Dollar Equals Feet Grave-accent Hat Inches Join whacK/stroKe Less-than More-than Number Open Paren Question Reverse-whack Square brackeT Underline Verticalbar Wiggle eXclaim y(Spanish for "and"). % and z are shaped the same as are * and 0. Comma has 1 "dot" while colon has 2 dots and semicolon is a bit more than colon.
I could see swapping /=k and &=y to get /=y and &=k based on similarity of shape (the whacK/stroKe connection is rather weak). *shrug*