If I were to pick only one, and had to pick fast, then I would pick this one as my favorite submission so far from the ones I played:
Petville:
https://kingdompots.itch.io/petville
There's quite a few other submissions I liked a lot from this jam so far too, including:
Avoid the Storm
https://cringenut.itch.io/brackeys20242
Rabbeat
https://dinocloudlet.itch.io/rabbeat
In the Depths
https://jaekit.itch.io/in-the-depths
Purrfect Storm
https://muuurbles.itch.io/purrfect-storm
Hook Line and Sushi
https://menimeno.itch.io/hook-line-and-sushi
Ice Ice Maybe
https://ditziedoodle.itch.io/ice-ice-maybe
Steven's Kinda Pissed
https://justinodev.itch.io/calm-before-the-storm
War Before Harvest
https://nathanthecraziest.itch.io/war-before-harvest
No Calm Before The Bell
https://masstermax.itch.io/no-calm-before-the-bell
Ella's Alone Night
https://bluepained.itch.io/ellas-alone-night
Monsters of the Storm
https://abstractdigital.itch.io/monsters-of-the-storm
The Clam Before The Storm
https://silverweasel.itch.io/clam-before-the-storm
Valentina's Adventure
https://reidkgames.itch.io/valentinas-adv
Hermit
https://pequenodev.itch.io/hermit
Crystal Mole
https://jijigri.itch.io/crystal-mole
As for mine, you can check mine here:
Game Page: https://skykone.itch.io/cloud-survival
Rate Page: https://itch.io/jam/brackeys-12/rate/2966822