Games like Kitten Kingdom
Games like Kitten Kingdom include Webbed, Trine 5: A Clockwork Conspiracy, Ori and the Will of the Wisps, SANABI, and Sonic Superstars. We matched them by the tags players give Kitten Kingdom on Steam (Action, Adventure, Action-Adventure, Platformer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Webbed
Shared: 2D Platformer · Exploration · Puzzle Platformer

Trine 5: A Clockwork Conspiracy
Shared: Action · Adventure · Platformer

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

SANABI
Shared: Action · Adventure · 2D Platformer

Sonic Superstars
Shared: Action · Adventure · Platformer

Öoo
Shared: 2D Platformer · Puzzle Platformer · Exploration

Hollow Knight
Shared: Platformer · 2D · Adventure

Darwin's Paradox!
Shared: Action · Adventure · Action-Adventure

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure

ANIMAL WELL
Shared: Exploration · Platformer · Puzzle Platformer

ANTONBLAST
Shared: Action · 2D Platformer · 2D

Trine Enchanted Edition
Shared: Action-Adventure · 2D Platformer · Puzzle Platformer

Tomb Raider Game of the Year
Shared: Action · Adventure · Action-Adventure

Monster Boy and the Cursed Kingdom
Shared: Action · Adventure · Platformer

Rise of the Tomb Raider™
Shared: Action · Adventure · Action-Adventure

The Darkest Tales — Into the Nightmare
Shared: Adventure · Action-Adventure · Platformer

Prince of Persia The Lost Crown
Shared: Action · 2D Platformer · Adventure

Crypt Custodian
Shared: Adventure · Action · Exploration

Chained Together
Shared: Adventure · Platformer · Puzzle Platformer

Phoenotopia: Awakening
Shared: Action · Adventure · Platformer

Sonic Frontiers
Shared: Adventure · Action · Exploration

Well Dweller
Shared: Action-Adventure · Action · Adventure

Planet of Lana
Shared: Action · Puzzle Platformer · 2D Platformer

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