I'm continuing to hand render the Zombie Daze game, it's a lot of fun. Posted here are a couple level renderings: swamp (which became rocky field), football field, forest, suburbs, and graveyard. Each is roughly sketched with pencil, then filled in with prisma color markers.
When said and done, I'll be re-rending these in adobe illustrator to get a vector layout that is scalable. I may be using some of the textures from the markers to maintain the rough feeling for the game.