Holy Crap, all this comments are so pointless. Just memerize on combo and keep using that ONE combo (I suggest projectiles). By the way, if you are on the right side, simply reverse the combo (except for Moses's fire bush combo thing, you have to point AWAY from your oponent) just point the first key at your opponent, do combo, wait then... BOM your combo happens. How come none of you whinners ever think to play around/ fiddle with the controls.
PS: If your game lags, Your computer sucks (I have a laptop and it doesn't lag for me).