Fix the bosses. If the tab closes or disconnects while you're fighting a boss, you should start at the same money level, not the next money level. "Oh, you crashed after spending $2000 to fight the boss? Now spend $6000 to fight the boss, without any progress!"
I think there's a glitch in the lake track where the bloons take a windy path along a shore, the engineers' sentries are showing up in the water and on the path itself
The game keeps raising heroes to levels higher than I want to. Like a hero is at level 124, I want them to be at 125, so I click it once... and it acts like I clicked it twice. I've had to waste money getting them up to the next increment of 25 because of this.
In the later levels there are so many balloons on the screen that there is major slowdown and I can barely see what's going on. It's not fair to lose in that state when I can't even put road spikes down.
I think the armorer is a chick, she has a bust and colored lips (this art style seems to color the lips of the girls and keep the lips of the guys skin-colored).
 "Bloons Monkey City"){kind=icon}
 "Swords & Potions 2"){kind=icon}
 "Clicker Heroes"){kind=icon}
 "Bloons TD 5"){kind=icon}
 "Decision:Medieval"){kind=icon}
 "Idleplex"){kind=icon}