hey menen, just a little tip, dunno if it bothers anybody else but:
sometimes when, well, for instance, a character kicks another character in the head, it kinda looks like they're just floating there. try to make it look a little like they're actually moving. and by this i don't mean motion blurring everything, i mean more like making wind lines or showing that there's like, pressure being put on something which in this case would be the head.