4.5/5 for me. Very simplistic tower defense game, as it should be. Developers seem to think that to make a good TD game you need to make them absurdly complicated. You did a good job for your very first game and kept it simple. Only things I have to complain about is the art, which I'm sure will be better as you continue to develop more games and also how much there is to do. Only 4 levels and 3 towers as well as 3 types of enemies makes for a very short game. I liked it, but I wish it was longer.