Games like The Little Moon
Games like The Little Moon include Refind Self: The Personality Test Game, Chained Together, Planet of Lana, Vampires' Melody, and Pikuniku. We matched them by the tags players give The Little Moon on Steam (Adventure, Casual, Choose Your Own Adventure, Action-Adventure, and Arcade): closest matches first, and among equally close ones the better-known games.

Refind Self: The Personality Test Game
Shared: Adventure · Interactive Fiction · Choose Your Own Adventure

Chained Together
Shared: Adventure · Casual · Platformer

Planet of Lana
Shared: Adventure · Platformer · Puzzle

Vampires' Melody
Shared: Casual · Adventure · Visual Novel

Pikuniku
Shared: Adventure · Casual · Puzzle

Sonic Superstars
Shared: Adventure · Casual · Platformer

LIMBO
Shared: Adventure · Platformer · Puzzle

Laughing to Die
Shared: Adventure · Casual · Platformer

Trine 2: Complete Story
Shared: Action-Adventure · Platformer · Puzzle

Ori and the Will of the Wisps
Shared: Adventure · Platformer · Action-Adventure

There Is No Game: Wrong Dimension
Shared: Adventure · Casual · Puzzle

Nihilumbra
Shared: Adventure · Casual · Platformer

BEEP
Shared: Adventure · Platformer · Casual

SANABI
Shared: Adventure · Action-Adventure · 2D Platformer

Rogue Legacy 2
Shared: Arcade · Adventure · Platformer

Rewrite+
Shared: Casual · Adventure · Choose Your Own Adventure

FEZ
Shared: Platformer · Adventure · Casual

Neva
Shared: Adventure · Platformer · Puzzle

SUPER CHICKEN JUMPER
Shared: Arcade · Action-Adventure · 2D

Portal 2
Shared: Platformer · Puzzle · Adventure

BlazBlue Entropy Effect
Shared: Action-Adventure · Platformer · 2D

Florence
Shared: Casual · Adventure · Interactive Fiction

Storyteller
Shared: Adventure · Interactive Fiction · Puzzle

Thank Goodness You're Here!
Shared: Adventure · Casual · Platformer