I am on a formerly fairly active game app forum elsewhere and it's been dead for years. Indie developers are still probably making some releases, but the combination of Apple being unfriendly to small developers and the economics of the whole thing means it's close to dead. There were tons of experimental little $1 or $2 games in the early days but that seems to be gone. Even worse many of the old ones aren't playable anymore because they never made the transition to 64 bits and OS support for them is gone.