That was sweet! I loved the silly "Do you know?" factoids between the levels, and the cute graphics. The fact that enemies attack Bobby (as opposed to many similar games) makes it more challenging and interesting.
My only complaint is that it isn't completely clear how to get all stars, it took me a while to guess that I should never miss and that I must always free the villager, but sometimes I got less than three stars and didn't know why :( Did manage to get 'em all in the end :)