The manlier version looks pretty good. I'm not sure how we're going to coordinate using him in the game though as my time on this game is pretty limited - I need to promote many sites through various means and the Coal Plant game makes up a tiny portion of that promotion.
The easiest thing we could do is use the artwork of the character as a background for the main menu screen (640by480 resolution). I would also credit you in the readme file of the standalone version as being the artist for that artwork if you wish.
EDIT: Covering him up a little bit more couldn't hurt also
