Points here for a little originality and a beautiful style. The one-person studio Diax Game have announced their "2.5D" platformer OSK.
In OSK you play as a squirrel, climbing an ridiculously large tree to get away from the chaos of an apocalypse. You need to climb fast, avoid other animals and solve puzzles to stay alive as long as you can. Certainly an interesting idea and it actually looks quite good too.
We get a huge amount of platformers from indie developers, so to see one that's truly attempting to be different is really nice. I spoke to the developer on Steam recently, where they confirmed Linux will be supported just like their previous title STARBO.
Take a look, wishlist/follow OSK on Steam.
No current release date yet other than sometime later this year.