One of my first projects was an Augmented Reality game for iPhone. Not really a game, more a small experiment. I wanted to test physics toolkits. There are three balls that chase and destroy other bouncing balls the player sends. Or go after the player, when become bored.
I used Xcode and Codex chat mode.
I played a bit with physics and sound. For example, I wanted the sounds of balls behind the player to be softer. It was fun to program.
I need to find more time, finish the concept, and maybe put it in the App Store.