Well...
One more time for good measure.
So I'm looking around on the web for hints- apparently people have made it to level 100 (however not finishing the game- they were done in before level 100 was completed) by using a "Money Hack".
You download the game, and then open the game properties (really I don't know, just going on a youtube video of how it's done).
You then enter a code that allows you to fiddle with the amount of money you start with. People have started with $5000 instead of $80 giving them plenty of cash for firepower.
F---ing cheaters!
Anyway- I did come across a video of someone making it to level 93 without the money hack.
For one thing, don't use Plasma guns; they cost too much eating up your cash for DCAs. Use the SAM turrets; they are cheap (last upgrade is only $160). You can survive with one, then two final SAM turrets for over half the game.
The rest of your money goes into DCAs. You place them in the center of your screen working outward. The guy who made it to level 93 had 12 full DCAs (I think) in the middle of the maze.
And the Maze is much simpler than we have been making it.
The left side has three long hallways the bugs have to navigate through. In the middle is a giant area with just one long wall for the bugs to go around (eventually you fill this area with DCAs).
The top right and bottom are the exits that you move a single Vulcan back an forth.
I made it up to level 86. I only managed 8 full DCAs and a blue one. When the helecopters went by on level 79 and left me with only one life left,
I sold all my DCAs just to concentrate on the back log of ground bugs that were trapped in the maze. I knew I wouldn't make it past level 86 (the next round of helecopters)- so I thought, "what the hell" let's see what happens.
Well by this time there were soooooo many bugs that several full Vulcan towers, at least 4 full SAMs and two full Plasma towers did nothing to break the lines.
Oh yeah- I also put two pairs of full Freeze towers at the beginning of each entrance to slow the helecopters as they came out (I sold them at the end for cash as well though).
Behold...
The horror...
The horror.
And so I feel I can not go any further with this abomination of my time.
No more.