I really enjoyed playing most of this game. The art style is good and consistent. The gameplay is a neat twist on tower defense games with the additions of semi-autonomous minions and towers that you have to fire manually. The levels are well designed.
However at the higher levels, Ive found a few that I cant beat or that are very difficult. What happens then is that, since Im not beating levels, I cant upgrade weapons anymore.
Its pretty nefarious but I think its actually a pay to play game in disguise. You pay up front and then again if you want to win.
WoW Player 08348921734 about Castle Doombad