A Well of Happiness  

Polygon’s Super Mario Odyssey review:

The whole game is basically structured like a massive playground. Spend as much time as you want messing around; chances are you’ll be rewarded for it. And, just like I remember from my formative years, this emphasis on exploration and discovery serves as a bottomless well from which to draw buckets of good feelings. I can say with confidence that there hasn’t been another game this year that has so consistently had me grinning.
I’m something like 20 hours into the game so far, and absolutely loving it. There’s really nothing like playing a new 3D Mario game for the first time.