They gave him five hundred dollars, so he could open the Disney Brothers Studio. Disney hired a distributor to advertise its Alice comedies. Once the Alice plays became popular, he expanded his studio and made Oswald the Lucky Rabbit. After the character's release he had problems with his distributor. When the problems with his distributor ended, Disney, Roy and Ub began creating the character of Mickey Mouse. Later that year they released the movie Steamboat Willie. Once the film was a huge success, Walt Disney ran into trouble with his new distributor. Pat Powers wanted to take over the character of Mickey Mouse. For higher wages most of his employees left, including Ub Iwerks. Pat also thought that Disney would follow him and give him ownership of Mickey Mouse for a higher salary. Instead, Disney and his brother Roy took over the contract and retained the rights to Mickey Mouse. The Disney Brothers Studio later became Walt Disney Studios. During the time of the Great Depression, Disney experimented with color and sound. For his work during that period he won two Academy Awards. In 1932 he opened the Disney Art School and then built a studio in Burbank, California. In the same year he released the films Bambi, Fantasia, Dumbo and Pinocchio. In 1941 its employees went on strike to obtain better working conditions. The US Army then began using his studio to train and study propaganda films. Walt then focused on making patriotic films due to his government contract. In 1952 Walt Disney began thinking about building Disneyland. In 1955 he opened the park and his dream of providing entertainment for adults and children came true