The movie starts out in a trailer park named Paradise. A boy plays a video game and then is recruited to help fight in space for Aliens.
The Last Starfighter (1984)
Video game expert Alex Rogan finds himself transported to another planet after conquering The Last Starfighter video game only to find out it was just a test. He was recruited to join the team of best starfighters to defend their world from the attack.
HorusKol’s answer is correct. However, The Last Starfighter had no character named Zoltar. Similar sounding names that were in the film may be Xur played by Norman Snow or the bounty hunting Zando-Zan.
Zoltar was the name of a coin-operated fortune telling machine in Big (1988). Tom Hanks played the lead role of Josh Baskin, aged 12 or 13 at the beginning of the story. Josh is humiliated at a carnival in front of a cute girl from school for not being tall enough to safely ride one of the rides. He sulks away to find a Zoltar machine and wishes to be big. The next morning, Josh wakes up in the body of a thirty-year-old man. For a few weeks, he enjoys the “easy” life of an adult, has a few awkward experiences that his youthful naïveté blind him to but that are humorous to the audience, and variously impresses or incites jealousy in his workmates with his refreshing outlook.
In the end, Josh gets homesick and decides he had it better as a kid.
Watch the entire trailer below.