Its fun, but the latest update has made it stupidly difficult, and not for the casual gamer. The app will crash if your game is interrupted by a phone call or text, and if you are on the build menu when you receive a text, the app locks up.
I love the concept, but the first round through the levels needs to be a little easier. If you want, you can up the difficulty for when you replay the levels later.
Mythoughts1 about Epic Defense TD