Good game, worth a try – Towers N' Trolls HD Review
There are no more ads and it is free, so why not try it. Personally I like it. You have to play the last Badlands level, 5-5, on Casual over and over to get gems. You can get over 100 in about 5 minutes of play. Anyway, if you like tower defense at all, this game is worth a try.
Review by Apps tear on
Towers N' Trolls HD.