LOS ANGELES, April 2 (UPI) -- In A Minecraft Movie , in theaters Friday, Jack Black and Jason Momoa work overtime to sell the film's overly complicated premise. Their admirable efforts are no match for a disastrous script. Based on the popular video game, the movie opens with a pre-title montage that feels longer than an in-game tutorial. Steve (Black) explains the rules of Minecraft and how the live-action and CG-animated adaptation will work: Steve discovered a portal to Overworld in the