Ok if you want to get really far in Bloons Tower Defense you have to put down a lot tacks down that will last about 5-7 levels. Then, as you get more money you start making more towers and eventually being pretty much unstoppable. Please reply!
True, and also place lots off bomb cannons i recommend 6 - 8. They stop all the balloons for 40 levels! Upgrade them full and let them cause heavy damage to the balloons! works almost on every level.