after getting to about 3rd level you should have max model, max booster, fuel savers, a few better flying things and the crane boosters + time. If you do this and stay low to the ground conserving fuel you can rely on cranes, stars, and windmills to get you WAYYYY past the distance you need to go. I could go atleast 5000 doing this.
@time562 hehe minecraft is Multi-Player also: and itll have alg if your on a huge server yes, because it has more coding and objects and physics: amd if you havent noticed, creative mode aka what this is but better is free.
@Dude abaker somtimes they dont kill enough to pass a certain stage, for example: 250 zombies are in building. Status:Overun, First mission killed 10, Second 15, third 8, fourth 22. And the astatus may switch at 150 or something, which you wouldnt have gotten to yet. I had to run a mission on a place a few times before i jsut ran 20 soldiers in it and insta won it.
@ Ghurkal It jsut increases fire speed greatly, if you notice, each upgrade is about 5 or so seconds faster, meaning the final upgade has a reload speed much faster than the first one which seems to fire only once per wave.
A quick way to earn some money if you have a paladin, go to training grounds. do nothing till its the paladins turn, then holy quake for instant kill and 40 gold just like that :P.
the 3rd level had me confused a bit but i figured out i had messed up parts. The 4th i used my trusty rifle scheme and trusty crouch scheme. And then i just meesed around with a flame thrower scheme that worked great.