Granted I don't judge new people (such as myself) but try and make it have more... action? instead of just three targets. Keep at it until you have something people wont hate on you for making.
I dare say, these people have made the TD genre reach a new level of brilliance. However, I believe they ought to try and visit a new genre. such as a good RPG, or an action game. Just try and make some more varying stuff. But still, its a good game.