This game is honestly so easy... I played it back when it came out and I'm playing it again now to get the Kongregate badges.. Just make pure towers, few towers and upgrade them... I start off more levels with 2 towers and get them up to lv4 before building anymore. It works. I get gold most times on the first play through the level..
Why do most people who dislike games lack the ability to type/spell properly? Maybe that's why you hate the game, you don't understand the function of a keyboard...