In maze games someone, not me just saying that someone may discover a hack or a cheat to pass them in some seconds. Im not that someone but i just saying it cause its good to know that someone (not me) may do that.
its good. in 1st boss: you need to stun him and then use the missiles.
in2nd boss:you need to use the flame sword and when he attacks you need to jump.
in 3d boss:you he is imune to all attacks expect nitronium gun.
in 4th boss you have to run cause he hunts you and as you run you must shoot him.
in 5th boss you must use your shield as a mirror to counter his shoots and in final boss you have to use sword when he is coming to strike you, you have to use shield when he shooting you and you have to use your machinegun to kill him but it will be very hard.