What kills me is that you have a certain level of difficulty until a certain spike wave, like they are trying to make you use bloonstones. Pisses me off. Wastes so much time...
I had a character stuck in a corner with a treasure chest blocking any movement, since they had the platemail that made it so they could only move 1 space. :( Had to quit that game.
This game makes me think of Final Fantasy Tactics = it would be awesome if you could develop a similar game with a job/class system, Nerdook! Give it lots of levels of customization that you always do and I know it'll be a hit.
Couple of tips I have found:
1. Always put a Johnny near the beginning of the trail - he helps those pesky Indians use up their stealth early on. Have your heavy hitters mid-way or near the end of the trail (usually Mid-way)
2. For tough bosses, as he passes your initial hitters (and gets out of range) pause the game, sell those early hitters and re-place ones later on to attack the boss.
At first, I was a bit put off, wondering if this game was a one-trick pony... but then it unleashed its depth and creepy story at me... and I loved it! I couldn't stop playing!
 "Bloons Monkey City"){kind=icon}
 "Shape Fold 2"){kind=icon}
 "Dungeons of Kong"){kind=icon}
 "Live Puzzle"){kind=icon}
 "Siege Knight"){kind=icon}
 "The King's League: Odyssey"){kind=icon}
 "Falling Debris"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "Relic Of War"){kind=icon}
 "Deadly Neighbors 2"){kind=icon}
 "My Pet Protector 3"){kind=icon}
 "300 miles to Pigsland"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Long Way"){kind=icon}
 "Town of Fears"){kind=icon}
 "Parasite Strike"){kind=icon}
 "mush room"){kind=icon}
 "Truck Loader 3"){kind=icon}
Hah! It is good tradition! (Brings luck) ;))