Balidani, if you don't like a specific game then yes, you should rate it low, but Delalcon is saying that if you don't like the whole genre of defend your base type games, (Defend your castle, Storm the House, etc.) Then it isn't fair to rate a game poorly. You aren't rating the game poorly compared to other games of it's kind, you are rating it poorly just because you don't prefer the genre of game.
Simple and easy, but entertaining. A little too easy. The last level was the only one I had to try more than once, and each level only took about 20 seconds. Number 2 coming maybe? Make it harder though.