[PC][2009] zombie defender base builder

It was a flash game in which you needed to defend an apartment complex, or some sort of multi leveled building. There would be waves of zombies, with some time to upgrade the building in between waves.

You could move freely through both sides and all levels of the building. You could also hire companions that would take positions to help you defend the base.

There were some sacks on both sides of the building as barriers.

I tried drawing what i could remeber, i think this is what the right side looked like, but i cant really remember what the characters looked like.