Creating space invaders game on XCODE 7 macbook air

Builds a rudimentary Space Invaders game in Xcode 7: left/right ship controls, shooting, one- bullet limit, and a working Start flow. Replaces block graphics with a downloaded spaceship, laser, fireball, and space background, while questioning image-use permissions. After rearranging storyboard elements and relinking outlets, the game works; fireball speed changes from 7 to 25, then 18.

Hands-on experimentation is building confidence and complexity after only a week learning Xcode.