Shelter is an artistic game with the story focusing around nature. You have around 1 hour 30 minutes of gameplay with this game. Since it's a shorter game, I'll keep the review more simplified.

Visually and sound wise, the game is both very artsie, while also being atmospheric and immersive. The game kind of reminds me of the kind of picture books or folk tales that you read in Europe. You're just an animal in the forest.
The goal of the game is to keep your little ones fed and safe. You have to dig up vegetables, pick off apples from trees and hunt down frogs and foxes so that the little ones can be fed. Along the way you're meant to dodge dangers such as an eagle, river rapids and other forces you can expect from nature.
Because you're caring and feeding for your kids, you become extremely attached. They make cute little sounds, which makes it all the more painful if you end up losing one of them. It's an incredibly effective storytelling means and I almost started crying while playing this.
The game design is intuitive and easy for the player to understand. The control scheme is also very straight forward. The only minor thing is that the little badgers can have buggy pathfinding to eat some food sometimes.

It's a very good and artistic way to tell a story about nature, about nurturing as well as loss. This game is wonderful and I strongly recommend it.