SouthPAWGames recently released a demo of their upcoming action-platformer SKUL, it's rather impressive with a pretty unusual cast of characters.
You play as Skul, a skeleton guard with the power to switch heads with another and gain their power. From what the developer said, eventually you will regain some memories of your past life and eventually face your original death and find out the truth. Certainly sounds intriguing, check out the trailer:
They went through a crowdfunding campaign on tumblbug. A little hard to follow, since I can't read Korean but Google Translate seems to do an okay job. SouthPAWGames managed to hit way over their goal and they seem to be planned an Early Access release on Steam.
Currently though, they're offering a demo on itch.io and it's very impressive. Great art style, with some interesting game mechanics and the combat is really fun. Even though the Linux build has been labelled as an "Experiment", it seemed to run extremely well for me.
Try it out on itch.io, it's worth a go. If you do try it and enjoy it on Linux, letting the developer know would probably be a good idea.