once you start the game start to reapair once the first wave comes jump on to your (the roof of your car) the animals can not damage your car when you are up there but the zombies can once the zombies start to come simple run to the and jump over them then repeat untill there dead (make sure you are shooting them while doing this :P)after the first wave or so you will get a level up the first thing you wan't to get from you skills is exp boster then money boster then reload boster then health regerater once you have a nuff money for the shot gun buy it (skip revolver and uzie they are not that good ) after you get these thing you wil nead to get your car door for your car (only get this when your car askes for it) after the door it will ask for a tire at 50% reapired at this point biger zombies will start coming in the wave (hot tip for when repair ing after a wave you an reload while reapairing) by this time you should be aroud the ak 47 or past if you are not ther yet i sugest to get it after a while at repair 70% you will nead to get the next tire then by the time you get that biger zombies will start comeing in the waves at 90% reapair you will nead to get the tire pump withch is all the way to the right make sure there are no zombies in the zone or a wave that will start soon for it takes a bit to get over to the pump and bring it back once you get you are repaird it will tell yu to get in make SURE THERE ARE NO ZOMBIES THERE OR THAT ARE COMING for i takes about 5 to actuly get the car going and if there are zombies there they can brake you car befor you leve but if you happen to make it away YOU WIN CONGRATULATION YOUR A WINNER i hope the guid helps you but remember have fun with it.
This guide seems poorly written and has no strong guidance what so ever, in fact I beat the game and unlocked all the attachments the first time round.
I do exactly what you do except the order of guns that I buy is: First shotgun-Second shotgun-Miningun. Skip all the rest. And the skills I do: Exp and money-Exp-Money-Reload and regenerate-nothing-Exp-money-reload-regenerate and after that it doesn't matter.