too many glitches at first the scorebar exceeds the screen and second if you make a small roof above you and you jump into it you'll get stuck and unable 2 attack except for the psychic head explode thinghy but its limited
just get an old mouse with scroll function and remove the sencor and attach the sensor to something that spinns fast (like a lawnmower or carwheel) succes guarenteed:P
another few glitches witch you could use to get some advantage 1: if your down and you need to get up quick just pause the game (also works to interrupt some boss abiletys like chrono blast) 2:when you switch weapons after you shoot there is no reload time (handy for granade launcher or shotgun) 3: pausing the game also refreshes your weapon (you can shoot after you unpause wich is useful for a granade launcher)