Hi, first of all thanks for playing our game and thanks for reviewing it ! It's cool to see someone play your game and how they play it. As you said, the blue tower slow down the enemies, that's why some of them couldn't move after so many shots. I guess we could have explained that, and there is room for improvements :). Anyway, we are pretty proud of having finished our game, so thanks again for playing !
PS: We also played and enjoyed your game. So good job finishing a game in so little time too ! ;)