I have a small issue regarding control of the fighter. When I want to execute forward/backward jumps, I am simply pressing Up and Left/Right at the same time, but when I want to Duck I need to let go the directional key first. When I am pressing Left/Right and than Down key at the same time, fighter is keep standing, and like I mentioned, it is ducking only, when I am letting the directional key go. This is especially frustrating if I want to implement uppercut punches quickly, but the fighter is jammed, because I forgot to let right/left key go. Is there any way to fix this?