Full of win
Really great work! However - brace for impact - here come the Buts:
1) Could you make a version without the names? The level names are translated to something else in at least some of the translations (the original ones for sure, and the new ones where the translator was feeling creative enough). Thus the town names on the board are misleading.
The rat ad on the other hand is okay in my personal opinion, since the text (or the part of it that's readable anyway) is not needed to convey the meaning but only flavor. Theoretically it would be preferable without any text, but in this case it's just not doable, I think.
2) I already had this thought when I saw your previous image, but couldn't lay the finger on it; however now I know what it was: The syringe is looking too dangerous for a toy imo. It looks as if you could really pierce someone's skin with it. Maybe make the needle thicker and cut off the end before it becomes too pointy. I mean, looking at it from a toy manufacturer's view, this would mean that it's both easier to make and less likely to break.
3) I love what you did with the jigsaw puzzle. People who know will have a good laugh, and others won't even notice your little easter egg there
However I believe that you've used the original base graphics there, which is a no-go if we want this included in CorsixTH. Please use the OpenGFX base set and to be absolutely safe contact the authors for permission to use a screenshot of their work in a derivative work - or else you probably would be forced to release it under GPL, which is what I think they are doing with their base set.
Now to your question: "CorsixTH" would be the most likely candidate for the correct name, at least if you define "correct" by "used in most places", where the google code project page is a notable exception...
I love your ideas with the pawn going from junior to doctor to consultant (also corresponds to the different path styles on the board, nice!), however I can't really picture in my mind how you could fit a suitcase or even a car to the pawn without it looking strange...
In any case please also make a version without a pawn, that we could include as a static image - this can double as a level selection screen that some people have requested. Level names could be displayed there localized in form of tooltips.