Cool game, too simple (good for children), too short

I found the game really great. Unfortunately, in my opinion there is no difficulty to, I would have liked a challenge, but safe for children well. I think the campaign is too short, but the game is designed to explore the city after Kampange. The loading times extremely nervous, because they sometimes come both before and after the cut-scenes. I find the price a little high for the main story, but the game is not just cheaper ^^