Some problems with the game.
1. When you try to change the default settings, no matter what they always go back to default.
2. The problem that you have to log in every game is kind of annoying.
3. On a private game, you need to have a pass that they will input needed to join, because it is hard to play a certain person that you want to.
Basically, thats it about the game's problems, on a side note the flying enemies SHOULDN'T be de-buffed, thats why they have anti-air towers.
I tested this and I got up to level 13 on flying by only adding 4 anti-air with the other towers I use.
They are expensive because of the fact.
WOW really easy, get a tach shooter, regular monkey, a bomb tower, and 2 spike ball shooter and level them up all teh way one by one, then get super monkeys and level the range ones first, then others. Got to level 55 first stage hard by this method.