Lame.
There's no plane of attack. It's a 2D landscape made to look like a 3D one. If a zombie is standing at the bottom of the screen, and I'm standing at the top, and she shoots/throws something it can still hit me. That's the most retarded part of this game. In other words, shooting in the middle of a causeway will hit all zombies - the ones higher and lower, because the bullets touch their avatars.
The second part I don't like is the stupidity of the weapons. There are like 4-5 or more melee weapons, which all do the same thing with the same damage. Projectile weapons are nice (the submachine gun is the best), but you get very limited ammo that makes them not worth grabbing.
Then, zombies will attack you before you get in range, so if you run up to one you will get hit before you have the chance to attack. This makes melee weapons mostly worthless, since they have a longer attack range than your prostitute does even with a weapon. The game turns into a strafing mission where I move up and down to avoid attacks, since moving side to side is suicide.
You get money, but no upgrades, no health drops (none dropped for me anyway, so they don't exist or are too rare), and if you fuck around too long, you get swarmed and no amount of weaponry can save you from the myriad of zombies on the screen.