Steven Spielberg’s Ready Player One (B-) includes several moments of such unmitigated bliss that it’s a shame the full picture has a sloppy aesthetic, a cluttered and overlong story and utterly one-dimensional characters. It’s such a pop culture bonanza that it sometimes feels more like an incidental Comic-Con documentary than an actual feature film with a plot we’re supposed to relish. The intrepid director has a recent track record of rallying in the final sequences (“Didn’t you have a great time?”) but it’s a long slog cribbing plot elements of Wizard of Oz, Willy Wonka, Tron and more to tell the futuristic story of a teen trying to unlock three clues in a virtual reality game to win a life-changing fortune against evil corporate raiders of their own lost arc. Tye Sheridan and Ben Mendelsohn are wasted in the roles of the central players, with only T.J. Miller and Olivia Cooke getting standout moments as a wry animated bounty hunter and a spry revolutionary, respectively. There’s a wall-to-wall sense of nostalgia that culminates in a horror movie homage that is by far the best sequence. Otherwise the CGI is ugly and overwhelming and the action hollow with an undeveloped emotional core. This film should have been a magical sensation, but its user experience needed a bit more polishing.