It's hard to say much about this because so little has been implemented. To be honest I'd hesitate to even call this a prototype; it's more of a pitch.
I definitely like the concept of supporting the heroes. There's so much that could be done with it, so many directions to go in. The title, Who will save the hero, is great, too, and I'd probably keep that for the final game.
I like the art style shown in the conversation section, a mix of drawing and manipulated photo. A whole game done that way could look really good. I think there might have been a submission along those lines in the last jam.
The Google Maps overworld, on the other hand, looks horrible. I'm assuming it's just a placeholder; I would be very turned off if I saw that in a finished game.
With the interface as designed, it's not clear who's talking. Something would need to be done about that in a finished game.
Are you planning to develop this further?