Ittle Dew 2 [Steam, Official Site] is a Zelda-like action and adventure game from Ludosity that is now available on Linux, thanks to the day-1 release.
It doesn't have many reviews, but from the ones it does have it seems the outlook is favourable.
I only tried a little of the first one and it seemed to be a pretty nice game. I do not have a review key for this one, so I likely won't cover it in much more detail.
About the game
Ittle and Tippsie crash onto yet another island filled with loot, puzzles and mysterious inhabitants! With the help of a magical map, they set out to steal eight pieces of a raft from increasingly improbable locations including beaches, prairies, an art exhibit and some dude's basement.
Ittle Dew 2 is a charming and humorous 3D Action Adventure game with a focus on exploration and combat. Tackle the game’s dungeons in any order and discover the many secrets of its expansive overworld. With only four main weapons, combat and puzzling is streamlined, yet upgradeable inventory items add RPG-like character progression!