Wow...just wow.
The detail in the image is great, especially the cracks in the monument and the gravestones. The characters make me laugh every time I lay eyes on them and the way they messed up the monument is hilarious. Good use of shading and lighting as well and you can almost picture the sun hanging lazily in the afternoon, post-apocalyptic sky. Good job.
My only complaint is that the Castle Crashers monument is fictional.