Right idea....
The right idea but when the zombies come to invade the the city, its goes into "Let the bodies hit the floor"; the story line and era is a great idea, the music for training and educating the boy was choice, the music for the dark wizard unearthing the dead was top notch. It would have been nice to hear say a death march or something instead of modern rock when the zombies invade.
Also the zombies were all the exact same; yes I know drawing the sprites is tedious. Maybe draw 2-4 different looking zombies and then just make a mass amount of them??