While not great, I thought this was still pretty well done. I'm surprised you don't have more games that are about zombies. A pity one of your most popular art pieces wouldn't be one of your most popular. It's a pretty funny image. I just like how Mario is blue in this. It seems like someone like Mario has gone through every color scheme except blue. At least in terms of clothes.
I guess the orange boxes are supposed to be the ones from the games. They look more like crates here. I imagine Mario did go nuts after having to save Peach so many times. Peach looks pretty beat up too with all the purple around her face. Or is that supposed to be makeup?