This is a fairly short mission, where you’ll be inside of Paul and flying a ship. For the beginning, just make sure you don’t run into anything, like the walls or the other parts inside of Paul. Eventually, you’ll run into some green things that will “explode” when you shoot or hit them with your ship.

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The green polups can hurt your ship, but if you destroy them all, you get a trophy/achievement.

These things do damage if you hit them, but there’s not too many at the moment. Once you get to what is likely the brain, press the button to drop your load, but the rest is stuck, so you’ll have to shake your ship from side to side until the rest comes out. After that, it’s another romp through the rest of Paul, with more obstacles. At the end, shoot the top of the can to open an exit and finish the mission.