Also completely addicted... just passed level 500 - please let it end at 1000!
Anyway, for those wanting to try a new setup, this is how I build up mine for the basic map:
Key: blue=gun, grey=slowdown, yellow=rocket, red=SAM, orange=heavy rocket, green=teleport
The first pattern creates a short loop - loops are important at higher levels as they allow you to send long lines of enemies backwards and forwards round the loop until they're exhausted. By selling the tower nearest the entrance and moving one space to the right and down (the second pattern) enemies at the end of the loop are made to reverse and head back the way they came. It takes some practice, but it allows you to concentrate on building SAMs which keep you in the game.
I also get a teleport built early in the game to catch the first helicopters. We'll add more later.
Pattern 3 is just an extension, lenthening the loop - you'll need this once the fast trucks appear. Begin getting some rockets in and upgrade to at least one SAM when you can afford it.
Pattern 4 is almost fully extended, though still without many upgrades. By now, we have rockets along the central strip and have upgraded quite a few to SAMs. We've also added a couple of extra teleports.
Pattern 5 is pretty much complete - the central strip is full of SAMs and teleports for aircraft, and the rest is one long loop to keep the ground craft occupied until they're toasted. Once you get the loop technique right, you can concentrate your cash on SAMs and just exhaust the ground stuff.
Happy New Year!
Geof
