I doubt this game will actually do well. The graphics, to be honest are a bit dated, especially in the era we have today, where you can get realistic lighting and allsorts of realism in video games. It looks a bit cheesy as well. And also, I think that appeal will be on some of the more upmarket games, particularly the violent ones.
I've not been buying video games for a while, (The last one i bought was perfect dark on N64) so i'm not up to date on the current market trends, but I know myself that violent games such as GTA and metal gear solid are more my bag. This game looks too cartoon-ish for most of the market, and if it was steer madness or Vice city, I'd rather be a gangster than a cow.
I may sound a litle pessimistic, but I know for sure that this isn't the kind of game that appeals to me. It may appeal to smaller kids, but I think they'd much prefer to play GTA, resident evil and other violent games. i know it's kinda grim, that kid would be playing violent games, but I know for a fact that you get 8 year olds playing these sorts of games. I also doubt whether the vegetarian theme in the game would go down well with the audience.
I'm just thinking in terms of how I percieve the gaming market though. There may be some niché for this game that I haven't considered. But when it's released, we'll see how well it does and what the reviews are.