Orson Scott Card and most of his fans knew that Ender’s Game the movie would probably deviate at least a little from the book, as all adaptations usually do. Interestingly enough, he seems relatively unfazed by the fact, but is quick to establish the fact that the book is one reality, and the movie another one entirely.
He writes in his column, Uncle Orson Reviews Everything:
“…very few of the scenes in this movie [come from the book] – so it was amusing when others asked me how it felt to have my book brought to life. My book was already alive in the mind of every reader. This is writer-director Gavin Hood’s movie, so they were his words, and it was his scene.”
Card goes on to describe his experience (his one line in the movie is a voice-over cameo as a pilot making an announcement to his passengers) and getting to watch Harrison Ford (Colonel Graff) and Asa Butterfield (Ender Wiggins) film a scene together, though he’s unsure as to whether the scene will be included in the final movie or not.
“…it was wonderful to see how Ford and Butterfield responded to each other’s timing. It was such a delicate dance – and they worked perfectly together.”
Overall, he has nothing but praise for the Ender’s Game adaptation—including the way the producers chose to film the zero-g scenes (rotating wheels and Cirque de Soleil performers are involved)—and for the all of the actors. His stance on Ender is one that most fans of the original books will take; enjoying the books as well as the movies as two separate, standalone entities.