Games like Ynglet: Prologue
Games like Ynglet: Prologue include Defy Gravity Extended, GRIS, LIMBO, Hollow Knight, and Geometry Dash. We matched them by the tags players give Ynglet: Prologue on Steam (Action, Puzzle Platformer, Platformer, 2D, and Colorful): closest matches first, and among equally close ones the better-known games.

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · Action

GRIS
Shared: Platformer · Hand-drawn · Indie

LIMBO
Shared: Puzzle Platformer · Platformer · 2D

Hollow Knight
Shared: Platformer · 2D · Indie

Geometry Dash
Shared: 2D · Platformer · Colorful

Hollow Knight: Silksong
Shared: 2D · Platformer · Indie

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

Nine Sols
Shared: Action · 2D · Platformer

BEEP
Shared: Platformer · 2D · Action

Planet of Lana
Shared: Action · Puzzle Platformer · Platformer

Webbed
Shared: Puzzle Platformer · 2D · Platformer

Dust: An Elysian Tail
Shared: Action · Platformer · 2D

A Dance of Fire and Ice
Shared: 2D · Colorful · Indie

Portal 2
Shared: Platformer · Puzzle Platformer · Action

The Bridge
Shared: Puzzle Platformer · Hand-drawn · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Indie

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

Out There Somewhere
Shared: Platformer · 2D · Action

Sonic Mania
Shared: Platformer · 2D · Action

MO:Astray
Shared: Action · Puzzle Platformer · Platformer

Trailmakers
Shared: Action · Space · Colorful

Cuphead
Shared: Platformer · 2D · Hand-drawn

Neva
Shared: Platformer · Colorful · Indie

Nihilumbra
Shared: Platformer · Puzzle Platformer · 2D