Mini Ninjas boss one

Hey guys,
im stuck with mini ninjas boss one with the HUGE giant what ever I try to do is hopeless need help hereSurf_dude99
P.S This is the ds version

When the battle starts go up the stairs and boss will eventually start shooting blue things at you, dodge and hit him with shurikens in the face, then when a green hexagon appears hit it and he will eventually die.

thanks man your the best