A game starts with a video where a boy go's home coming from school and go's to his tree house and gets in a space ship thing and crashes somewhere. what is it called?

The game you're describing sounds like "A Boy and His Blob," which features a young boy and his blob companion embarking on adventures, or it could be "To the Moon," known for its emotional storytelling. However, if it specifically involves a tree house and a spaceship crash, it might be an indie game or a lesser-known title. Without more details, it's hard to pinpoint the exact name.