I’m not sure if it has Autumn/Fall vibes, but I’m tempted to get Slime Rancher 2. I guess it’s appropriate for harvest season, as you’re farming and harvesting slimes? Something about it (at least I got this impression from the first game) feels cosy and perfect to play while the days get colder.
I guess there aren’t many older games because it’s a list of games that are available on current hardware. Those older games that do appear are there because they’ve been ported/emulated.