No, no lagging problems.
While I agree there were no problems with lagging, I beat the first 5 levels by hitting "t". Then I progressed to occasionally jumping and hitting "t". Once, I threw my weopon. It went through the enemies head and somehow missed. Crazy ghost weopons! Look, I agree that the animations are well done, but the variety of moves and combos were.... not so good. The lack of special moves or spectacular grab + throws was dissapointing. Keep in mind that games with terrible graphics can still own amazingly animated games, because their engines rock. So my only reccomendation is to focus on the gameplay next time.