They need to be larger, and fade a lot better. With Sqirlz the puddles tend to disappear oddly, so it takes a bit of editing rather than just slapping them on and image saving (it's highly noticeable in that area when done this way) perhaps even extending the frame amount by 10 to give a smoother look. But play with it more and try to get an idea of how your rain is moving, then implement them.
Newagemugen