Say this much for Warner Brothers. They got the tone for “Minecraft” right.

The studio that turned Scandinavian Lego building block toys into blockbuster animated movies goes all juvenile in adapting Sweden’s biggest gift to pop culture since ABBA, and the video game adaptation “A Minecraft Movie” hits its demographic sweetspot — 12-year-olds — hard.

They gave the directing job to Mister “Napoleon Dynamite,” Jared Hess, and cast human plush toy Jack Black as the cuddly, whooping and riffing lead and paired him up with Jason Momoa, basically a plush toy that hits the gym. Or has.

They threw five credited writers at a cutesie, formulaic quest comedy set on the gamescape of the world’s most popular video game, and if it weren’t for Jack Black parade of “WoooHOOOOOs” and Man Mountain Momoa’s comically cowardly “You go first, I’ll cover your six'” to a nerdy/shrimpy teen, they might not have managed to cook up a single memorable line of dialogue.

The “story” is overwhelmed by pages and pages game-explaining exposition, which considering its pre-sold nature to hundreds of millions who have played and loved the world-building game, whose ethos is “creativity over (mining for) gold),” seems pointless.

But here is game avatar Steve (Black), trapped in an alternate Overworld reality with his trusty dog Dennis send back to Earth through a portal in the hopes that someone will find the magic orbs the dog took with him and return to free Steve.

Momoa plays Garrett, the greatest gamer in the world in 1989, now broke and running the Game Over World video game store in Chuglass, Idaho. That’s where Nathalie (Emma Myers) and her quirky, creative younger brother Henry (Sebastian Hansen) relocate, and where Henry starts to stand out for all the worst reasons among his dull classmates, standing up for “the math” that makes jetpacks possible.

“My Dad says math has been DEBUNKED!”

Henry finds himself begging Garrett to be a mentor, and pretend to be his guardian when the kid’s jetback experiment is sabotaged by bullying morons.

Finding Overworld orbs, they run off to an abandoned mine where they tumble into a portal, and sister Natalie and real-estate-agent/petting zoo operator Dawn (Danielle Brooks) tumble with them.

They find themselves in a world of block creatures, block people and block construction generated by tokens, talismen and the like in what dopey Garrett realizes is a game setting before everybody else.

A quest gets underway, Steve is freed and before you know it, he’s leading them far afield and referring to his now-sidekick Garrett as “Gar Gar,” which rhymes with Jar Jar as they try to evade zombies and pig minions of the evil Malgosha (voiced by Rachel House).

Black and Momoa and Jennifer Coolidge, playing another variation of her oversexed MILF persona as the school principal, commit to the their roles and raise the bar for how hammy and over-the-top this picture will be performed. The energy level these three bring to this picture is one of the great endorsements of Screen Actor’s Guild professionalism and a testament to Hess’s probably enthusiastic encouragment off camera.

Yeah, the script is crap-by-committee, but there’s no sense in us cashing our checks like we know that.

Chases, explosions, diamonds and this or that accessory/magical token or what have you pop up, no doubt delighting fans as much as the news that a wrestling match involve Garrett has him facing a “Chicken (looks like a duck) Jockey.”

That arrival brought a roar from the crowd I saw the film with.

And I don’t doubt the film’s sparkling “Labryrinth” and “Lego Movie” meets “Pixels” candy coored production design, the B-52s “My Own Private Idaho” comical needle drop in the middle of the Mark Mothersbaugh (of course) score and the many, many inside-the-game references and the constant mugging and whooping by the leads will appeal to some of those who’ve enjoyed the game.

There’s validation in wringing a “movie” with a “story” out of a video game, but that’s mainly in the eyes of the devotees of Sonic or Steve.

Harmless nonsense this may be, but if you’re under the impression it does a wildly popular, award-winning “creativity” game justice, you’d have to be right on the demographic money in terms of who the picture is pitched to — 12 years-old.

Rating: PG

Cast: Jack Black, Jason Momoa, Emma Myers, Sebastian Hansen, Jennifer Coolidge and Danielle Brooks

Credits: Directed by Jared Hess, scripted by Chris Bowman, Hubbel Palmer, Neil Weidener, Gavin James and Chris Galleta . A Warner Bros. release.

Running time: 1:41