The issues with this game are well captured on other reviews, I won't reiterate (I just wish I read them before).
* No difficulty setting, game expects you to grind lower levels until you get what you need.
* No buying guide. Game allows you to buy whatever you want, and the the AI assumes you have what you need to deal with rushes, not cool.
* Minimal to no strategy. It seems like you conduct the battle, the the problem is that a specific set of tools will work on a specific level. Get in, get beaten, try again with a different combo, again, again, until you realize you don't HAVE what you need, so GOTO 10; (grind)
* People put the gold challenges as a plus, but it isn't, because to get gold you need tools and tools cost apples and you get extra apples by getting gold, so you either have what you need and breeze the gold or you don't. Helps with the grinding, EXCEPT gold makes levels harder so it's not even grinding, it's hard grinding.
Would I recommend this game? No. If I do, someone will pick it up, get stuck at the 10th level or so, flip it off and go to sleep, never to play it again. Why would I do that, when so many great games are on sale for less? And for what? I'm not condemning the graphics, or the gameplay, or the music (fix that loop, BTW, at some point it just ENDS), I'm condemning the laziness of the developers to put in difficulty, which is mandatory for casual gaming, and a mild hind on what should use for a particular map. I don't have infinite time to waste on trial and error. Some people do. They play on Normal/Hard. I don't. I play on easy with hints. In good games.