hehe. I didn't actually pick up any shovels in the first level, but
this guy gets decapitated by one so you can probably pick up one here after killing this zombie. going a bit slow there, so let's say 5-6 minutes in and you could be wielding that wonderful spade
edit: the embed thing didn't like my time link it looks like. 8m and 30s into the video is what I'm talking about, aka. at the very end