with a real shaders it should be fantastic!!!.
great mock up. 
I'd really like to see the ghosts to float and making the opacity half or something, other than that good luck with your game :)
The half wall was required by my art director at that time, even though most of us preferred it to be a full-height wall. It was because we planned to reuse some assets for the company's other game assets. The mockup was also still very early to give the visual mood & look of the game, & that was why i haven't put many stuff on the walls & floors :). As for the glowy people, yeaapp, they were ghosts/souls :).
Really awesome, and very very appealing designs! I love them so much.
I think that showing half of the wall's height is a little confusing. Also the walls and the floor are a little empty, and the foes look like ghosts, just in case they're not, if they're zombies they would look better greenish.
Awesome work, great use of colors! As far as the mockup, I think the way the walls are halved with the doors jutting out makes for an interesting look! Really cool!
Really nice. Something 'Secret of Monkey Island'-esque about the protagonists, and the luminous ectoplasmic feel of the other characters is a perfect contrast to that gloomy, saturnine background. Great job.
The chars look great.
The hollywood power pose always makes me laugh. Imagine everyone in the subway waiting for the train in this pose lol.