Warner Bros. and Legendary are hoping for a monster-sized opening weekend for “Godzilla x Kong: The New Empire” and are tapping every method possible to pull in moviegoers, including partnering with Roblox to grab the attention of its young audience so that they will sway their parents to take them to the theater.

Over the past two weeks, Warner Bros. has been engaging Roblox users via its interactive trailer for the “Godzilla vs. King” sequel, which allows players to enter the 2D video and come out in the movie’s world of Hollow Earth. The trailer then becomes playable via an obstacle course where players are joined by Suko, the Mini-Kong, while navigating through the video and collecting movie-themed crystals.

For anyone who isn’t an active user of the platform or has a child who is obsessed with it, Roblox is an online platform that allows users to program...