READ THIS BEFORE YOU THINK IM GETTING TO THE HIGH LEVEL.
Before you get on the table, better you earn some points.
The best way to earn points is to Knife the zombies
When you have enough money you can buy two weapons.
When you are trying to get on the table from the door, you should stay on it till your ammo is really EMPTY. Max ammo will help you many times out of this problem!
ATTENTION:If you get a HAMMER drop from a zombie DO NOT TAKE IT, because all windows will rebuild. You think now, thats no problem because the zombies will get through that window again. Of course they will, but it can take 3 till 5 levels. And not at all, when the zombies came again through that window. It is not sure you can do the glitch again because the shelves will not be rebuild as the same sequence as in round 1.
If you are lucky the zombies will not come through that window again till you come of the table!
(i had it yesterday, so it is possible!)
Hopefully this is some information for you!