Games like Aya's Journey
Games like Aya's Journey include Celeste, LIMBO, Super Meat Boy, Braid, and Geometry Dash. We matched them by the tags players give Aya's Journey on Steam (Puzzle Platformer, Difficult, Precision Platformer, Platformer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Difficult · Precision Platformer · Platformer

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Braid
Shared: Puzzle Platformer · 2D Platformer · Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

Trine 2: Complete Story
Shared: Puzzle Platformer · Platformer · 2D Platformer

Thomas Was Alone
Shared: Platformer · Puzzle Platformer · Precision Platformer

The Pedestrian
Shared: Puzzle Platformer · Platformer · Puzzle

Squishy the Suicidal Pig
Shared: Puzzle Platformer · Platformer · Difficult

Will You Snail?
Shared: Difficult · Precision Platformer · Puzzle Platformer

VVVVVV
Shared: Precision Platformer · Platformer · Difficult

Creepy Tale
Shared: Puzzle Platformer · 2D Platformer · Platformer

I wanna be the Creator
Shared: Platformer · Difficult · Precision Platformer

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · Difficult

Portal 2
Shared: Platformer · Puzzle Platformer · Puzzle

Knock-knock
Shared: 2D Platformer · Difficult · Side Scroller

Hollow Knight
Shared: Difficult · Platformer · Indie

SANABI
Shared: 2D Platformer · Difficult · Platformer

Rain World
Shared: Difficult · Platformer · 2D Platformer

Leap Year
Shared: Precision Platformer · Puzzle Platformer · 2D Platformer

Jump King
Shared: Difficult · Precision Platformer · Platformer

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

Blasphemous 2
Shared: Difficult · 2D Platformer · Side Scroller

La-Mulana 2
Shared: Puzzle Platformer · Difficult · 2D Platformer