I tried leaving Medic for the last, then move towers next to them but that didn't help t all. This level is just impossible to beat. check it out, give me some tips.
I agree with all the comments. Kinda like the setup of the game but it really need some upgrades. There was a point in i think the 5 or 6 wave when the ground tower didn't fire on the ground enemies.
 "Terra God"){kind=icon}
 "Ghost Hacker"){kind=icon}
 "Spectrum TD"){kind=icon}
 "Blobble Wars"){kind=icon}
 "Corovan: the game"){kind=icon}