Ori and the Will of the Wisps
It's a joyful evolution of the first game in pretty much every way.
Ori's two biggest strengths are the art style, and traversal mechanics.
Lord, it's a beautiful game. Even looks great on the Switch and runs at an almost-perfect 60fps, just a few drops here and there when shit gets crazy. The environments are varied and full of gorgeous (and sometimes gross) detail. Character designs run the gamut from cute to creepy, and I love having a "home base" full of my little Moki friends chilling.
As for traversal, few games make movement feel as good as this, and the world is designed to challenge you to use all the abilities you earn. Flinging yourself off projectiles and enemies, diving into and launching out of sand or water. Ori has a wonderful sense of momentum.