Lucky Number Slevin is certainly Tarantinoesque bullets and blood galore, too many plot twists but ultimately emerges as a cool crime thriller. Director Paul McGuigan mixes oversaturated hues and jittery jump cuts with frisky screwball comedy. Hartnett is the object of a ''bona fide case of mistaken identity'' between warring gangsters (Morgan Freeman, Ben Kingsley). EXTRAS Witty deleted scenes, plus a commentary track where McGuigan mocks Slevin's ungainly title. ''It's like having an ugly child,'' he says. ''You learn to love it.''