The rocket Mickey is flying resembles the one from the old Tomorrowland attraction "Mission To Mars."
Might be the first time urine has ever been seen on screen in a Disney cartoon (albeit in crystal form).
Mickey and Pluto appear to touch down in Tomorrowland at the Magic Kingdom in Florida, based on the facade for the attraction Space Mountain in the background.
In the final scene of the cartoon,you can see Disneyland's Space Mountain attraction.