Apple is making casual games available- “casual” being games with little to no story line, easy to pick up and play, simple mechanics, no complicated settings or button layouts, short gameplays, requiring no special skills to play, no cutscenes, minimal hardware demands etc.
Opposite being “real games” - longer game play, usually with big storylines, more complicated settings, cutscenes, takes some tome to get into how game works, demands deeper dive into virtual world in general, not just tapping screen in one place for Mario to jump.
Hope my definition clears this clears this up lol.