Your take on the LoL characters is pretty cute. I don't like the song but that's just my own taste so I don't want to punish you for it.
Please don't zoom in on a drawing like that. It's very awkward and makes any animation mishaps stick out tenfold; which makes things like the sloppy leg frames hurt. Had you not expressly zoomed in on the legs most of the people here probably wouldn't have even noticed because her face and chest are more likely to draw the casual observer's eye (the head and facial features are great honestly).
Your models in general are good. My only other complaint is that the side characters pop in and out much too quickly to appreciate them. The first time Riven and Soraka popped up I literally only had time for my mind to register Riven since my eyes were on the screen's center and you popped an image in a corner for about a second and a half. If you're going to make cute visuals give people a chance to appreciate 'em. What a waste of perfectly good character models.
All that having been said, I think you did a decent job. And the more reinforcement there is to buy wards there is the better. You have some talent. Keep learning and continue to craft it.