Processing power problems

Game is challenging at times and takes patience. Eventually you will get to upgrade everything for free. (Takes longer) however, When you get to the higher levels in contestion mode, or even regular levels, the processing abilities of the game are limited. I was unable to use any abilities at round 65 due to the game trying to think about all the towers shooting and balloons popping. ( at this point there are a lot) Unfortunately,the zomg still kept moving along the track while the game didnt let me play.

Avid bloons player about Bloons Monkey City