I'ts nice to return to the creepy world of Little Nightmares! The puzzle dynamics are renewed with the addition of a second character. And the non-spoken storytelling transpire throughout the game. It's a nice successor!

If you loved the first game then this is going to be your favorite

This game is a prequel to the story in Little Nightmares as you play as the little boy with a paper bag on his head (Mono) that rescue the little girl that will ultimately become the yellow jacket girl (Six) from the first game.
The game itself is a platformer at his core and you'll need to solve simple puzzles using your environment to progress. Six will assist you most of the time by giving you a leg up to reach high places or help you opening windows and crates.
Each chapter have a distinct mood and enemies: the hunting ground were you need to escape from the hunter, the school with the teacher and the bullies, the hospital with the mannequins and the doctor and ultimately the city were the inhabitants are slaved by TV and a mysterious tower.
Expect a duration of 5-6h for your first playthrough, it seems short but it's packed with action, creepiness and emotions from beginning 'till the last minute.