I extracted all assets of Knytt Nano, and made tilesets, gradients, and custom objects.
You can find the main character and some custom umbrellas
here.
The sound files are only comprised of Toadstyle's song (which is actually untitled, and "Explorewave" is a placeholder name) and some sound effects from KS, so you can get them
here.
You will find some folders called "Porting". They include auxiliary files you will need if you want to recreate parts of Knytt Nano (such as the glowing trees).