Steven Spielberg’s much-anticipated sci-fi movie Ready Player One—based on Ernest Cline’s 2011 best-seller—recently released a first-look photo, which had fans dissecting every detail to search for new clues about the film. What we know is that the movie is set in the near future, where the world has been destroyed by climate change and famine—leaving the grim population to seek solace in a virtual reality world, where they can live happier, alternate lives. When the creator of the simulated world—played by Oscar winner Mark Rylance—dies, he leaves behind his vast fortune as a prize in an intricate pop-culture treasure hunt filled with 1980s references and nostalgia.

“I’d say the film is very faithful to the book, but also an original story. There will always be something new with Steven,” Rylance told V.F. at the premiere of his latest film, Dunkirk, in New York on Tuesday. “The book has a lot of puzzles and keys that the characters have to figure out, and Steven has introduced new puzzles and keys so that the people who read the book will still not know how it’s going to work out. It’s a marvelous story with twists and turns and many thrilling moments.”

Ready Player One marks Rylance’s third collaboration with Spielberg. The two previously worked together on 2015’s Bridge of Spies and The BFG in 2016. The British star says crafting a realistic future overtaken by V.R. for the big screen has been a challenging task, even for the famed director.

“It’s a very, very complex film for Steven to make, and he was very tired and worried making it,” revealed Rylance. “But, now he’s seen it, and he’s very excited. There is nothing to be worried about. It’s going to be an extraordinary movie-going experience. I’m excited to see it when it opens, like everyone else!” The film hits theaters March 30, 2018.