Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1985 Pee-wee 's Big Adventure , directed by the then-unknown Tim Burton , was a financial success and , despite receiving mixed reviews , it developed into a cult film . Big Top Pee-wee , 1988 's sequel , was less successful than its predecessor .
Simplified: In 1985 , he starred in a movie called Pee-Wee 's Big Adventure , which was very successful .