In the previous part of this series, we made the invaders move, the player and invaders fire bullets, and implemented collision detection. In the fourth and final part of this series, we will add the ability to move the player using the accelerometer, manage the levels, and ensure the player dies when hit by a bullet. Let's get started.
Source files for the Tuts+ tutorial: Create Space Invaders with Swift and Sprite Kit: Finishing Gameplay
Read this tutorial on Tuts+