Yes i can describe it.

My method is very easy, when the game starts i kill the first zombie and then start to collect the shotgun ammo, after i have lots of them i kill some more zombies to reach 333 score so they all raise, then climb on the boxes that i showed in previous post where zombies can't reach me, i wait until all of them gathers around me(some zombies may get stuck behind obstacles farther from that place, so beware of them), then the fun part start, i run down from the boxes( make sure you don't fall onto zombies) and run away from them, then i turn around and start to shoot them with the shotgun, when they kill me the score gets multiplied couple of times.

When you are waiting on the boxes, you need to watch the way you climbed through, because sometimes zombies manage to climb there, but most of the time zombies don't come from that side so they are walking directly to you under the boxes