The next mission starts on the pier, where you take the boat from
At the beginning of the mission, go to the pier. There, you will get a boat. Get on the boat and follow the path. You'd better be careful not to block it. Finally, you will reach the Apollo Island.
Reach the destination, walk over to the glass side of the building and break inside, through the glass door. Inside, you will notice two chests that you should break and build a wardrobe with a spaceman suit in. Use the color gun swapper on the thug in this room.
Leave and, while wearing the astronaut disguise, go left. You will notice an incomplete white-and-blue climbing wall. To rebuild it, destroy the nearby crate, as the astronaut and finish it. These are special devices that flash in specific sequences of colors, when activated. You have to copy the sequences for the device to meet its use. The sequences are usually randomly generated. Once you do that, you will receive bricks that you need to rebuild the wall. You just have to paint them blue first. Then, climb onto the rooftop. You will build is a teleporting device - stand in front of the device and press the action key.