If you go to Conquest on the main menu and enter the name ("Hopelaw") as well as the other parameters, you get a specific map / scenario - that I liked :)
If you can assign macros to your mouse ( via logitech setpoint software or something alike), you can get the the expert badge with just one long click per level :D - get all tower upgrades, bomb upgrades, then place one super lvl2, call all waves and let the bombing begin...
Quite buggy... After killing the two gate sorcerers, I got stuck in a tree (while changing screens) and now the gate sorcerers don't appear anymore... Only solution: Start a new game?!?
To get a little extra cash: on lvls with green flying things, wait till you have the wave down to one plane; shoot it down only when your money doesn't count higher anymore. Hope that helps w/ survival mode.
I agree with previous posters, the timing is too tough for this game to be enjoyable as a "casual" game - in my opinion, the game should be about the general puzzle setup, not about getting it "just" right. Else it has a nice style and is nicely produced. Cheers.
for level 58, try using only lightning and concentrate on evading while its recharging - its what got me through.
for lvl 60: energy homer, big laser and laser lock, cycle as necessary, stick to the edges and dodge.
gl
Bridges are too unpredictable, sometimes workers do get across, other times they dont... wt*? Also a kind of stress indicator would be helpful, so you know which bridge element to fix.