That is a pretty cool idea. Actually, my girlfriend has been wanting to learn how to code yet I haven't been able to find something to motivate her. Maybe her love of RPGs and this will get her down on that path.
Funny you should mention that woud420, we started this to teach me (gsaines) because I wanted something more engaging than online lessons. But when choosing the artwork, genre, and overall style, we went more cartoony/cutesy because of Nick's wife's gaming preferences. We also made the main character a strong female figure so that girls could associate with story that we're putting together (not currently in the levels). We've got a half dozen new units we'll be adding shortly, and 4 of them are female to sort of balance things out a bit. In short, we're hoping it is something your girlfriend will not just feel comfortable using, but actually enjoy!