The Door in Ventureland is a quest given by Smee in that must be completed in order to progress to Pirates of the Wasteland.
When Mickey and Gus arrive in Ventureland, they notice Smee crying near the Treehouse and decide to check on him. The player then learns of what happened on Skull Island, with Hook turning Animatronic and making his crew do the same. They have invaded the Pirates of the Wasteland area and are going to cause more damage to Wasteland unless they are stopped.
Smee askes Mickey to go fix the machine turning pirates into Bashers, and in order to do so, he must open the door to the Projector Screen leading to Pirates of the Wasteland. It is operated by a machine that requires parts that were taken by the rest of the crew. Mickey must seek out the parts, the Figurehead, Ship's Wheel, and Compass.
To obtain the Figurehead, Mickey must speak to Damien Salt, who will part with it if Mickey helps him to woo his love, Henrietta. There are two options here: Gather flowers in OsTown, or buy Ice Cream from the Ice Cream Parlor on Mean Street. If the player chooses to buy the ice cream, Damien will give it to Henrietta in a Cutscene where she will reject him, as she is lactose intolerant and hates when people give her ice cream. If the player chooses to gather flowers to give to Damien, he will give them to Henrietta in a separate cutscene, where she will accept them since she loves flowers. Either way, Damien Salt will give Mickey the figurehead.
To obtain the Ship's Wheel, Mickey must speak to Tiki Sam, who will give it to Mickey if he collects his lost tiki masks around Ventureland. One is above the water wheel, one is in the clock tower, and the last is on the treehouse. Upon returning them to Sam, Mickey will recieve the wheel.
To obtain the Compass, Mickey must speak to Scurvy Pat, who will trade the compass to Mickey for his treasure in the treehouse. Helmsman Antonio took it from him and Pat can't climb the tree to get to it. Once Mickey retrieves the teddy bear, named Treasure, Pat will give him the compass.
After retrieving all these items, Mickey gives them to Smee who fixes the door machine with them and gives the player access to the next area, Tortooga.