Inspired by the style of 90s animation, Nanuka: Secret of the Shattering Moon really does look great with the blend of action-platforming and some huge enemies.
The artwork going into this is really awesome, and some of the animations look really fun too, especially with what looks like some of the boss battles. Appears very much to be a platformer that will be well-worth picking up when it releases with Linux support (no current date yet though). For a little background on it be sure to check out the previous GamingOnLinux interview with the team.
Check out the new trailer below:

Direct Link
From the Steam page:
Clumsy purple belt saves the world?
Nanuka finds herself thrown into the midst of a giant impending disaster! Play as a martial artist in this hand-drawn action platformer!
Beat 'em up with style!
Encounter formidable foes and bosses, fight through waves of enemies and uncover the evil mastermind's plan!
Gain abilities through allies!
Gather allies throughout the story to unlock new skills and abilities! Use and combine their powers to blast through the levels!
Will you rise to the challenge?
Uncover the secret of the shattering moon together with Nanuka and her allies as you platform and fight! Will you be able to saver her world?