Proceed along the path upon landing to find Peckers, Stinkeyes, and a Wallflower. If any health is lost in the battle, some apples on the ground should be sufficient to restore it. Up a small ridge is a new weapon, the Army Carbine. While this gun is slow to fire, a charged shot deals considerable damage over a long distance. Use it to defeat the enemies that spawn and a path will open. Past some Pincushions, off a path to the right is a bundle of Fragments and apples for health restoration. Once ready, follow the railroad and the screen will scroll with it. Defeat the enemies that spawn along the way. Narrow paths to the left will offer opportunities for health restoration.
At the first break in the railroad is the Arsenal. A narrow path to the left of the Arsenal will lead to a Pecker and Something Sharp. Once you're ready to move forward, continue following the railroad up. You will eventually come to the Shard; pick it up to get the screen scrolling again. You will have to destroy some logs blocking the path to continue; beneath the second set of logs is Something Fancy, an upgrade material for the Army Carbine. At the end of this railroad is a clearing. Interact with the person standing at its edge. Afterward, the Kid can pick up a new memento, the Sealed Note. Take the only path here to find the Skyway that sends the Kid back to the Bastion.