I would have to agree with skybard. It's not a 'poor buggy design'. The simple design seems to add to the wonderful child-like feel of the picture. It makes me think of being a kid again and letting my imagination take me to AWESOME BUGGY RIDES! VROOOOOOM!
This simply has to be one of the most adorably awesome pieces of art I've seen in a good while.
Haha, I think its only natural to miss some of the fanart you receive, since you probably have like, a mountain of them! But thank you for being so active in the MLP community and your work on the show. To see the staff respond so positively to the fans work is more than I could ask for. Thank you