Really needs a fast forward button that doesn't need to be held down. I generally play tower defence games by setting up a few towers, pressing fast forward and multitasking something else for a few mins. I can't do that when I have to hold down the damn button. Which is frustrating when you get to the later waves and you're owning the bloons.
 "Bloons Tower Defense 4"){kind=icon}
 "Age of War"){kind=icon}
 "Frontline Defense Beta 2"){kind=icon}