Space Alert is a simple and clever proof-of-concept text adventure game made using Apple's new Shortcuts app for iOS 12. Demo video above. From creator Marcel Wichmann:
Apple recently released iOS 12 and with it Shortcuts, an app that let's you automate a bunch of stuff on your iOS devices. I didn't find any useful way of automating anything, so I built a game. A text adventure, to be precise. It's short and kind of stupid but… it's free?!