Tap Defense on the iPhone is my heroin. This addicting game has you build towers to try and stop the Devil and his evil minnions from travelling from Hell into Heaven.
I tried and tried and could only get to level 30 or 31, a common sticking point. Then I decided to upgrade my interest instead of researching new tower types and I beat the game on easy my first try with over $200,000 remaining at the end.
