Games like Crystalish
Games like Crystalish include Donut County, Pikuniku, The Last Campfire, Slime Rancher, and Stray. We matched them by the tags players give Crystalish on Steam (Casual, Adventure, Puzzle, Side Scroller, and Cute): closest matches first, and among equally close ones the better-known games.

Donut County
Shared: Casual · Puzzle · Cute

Pikuniku
Shared: Adventure · Casual · Puzzle

The Last Campfire
Shared: Adventure · Puzzle · Cute

Slime Rancher
Shared: Adventure · Cute · Singleplayer

Stray
Shared: Adventure · Singleplayer · Cute

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

Florence
Shared: Casual · Adventure · Indie

OneShot
Shared: Cute · Puzzle · Indie

Unpacking
Shared: Casual · Cute · Puzzle

Carto
Shared: Puzzle · Cute · Indie

Scribblenauts Unlimited
Shared: Casual · Puzzle · Adventure

Moncage
Shared: Casual · Puzzle · Adventure

Toki Tori
Shared: Casual · Puzzle · Indie

Zup! S
Shared: Casual · Puzzle · Indie

Gorogoa
Shared: Puzzle · Casual · Indie

The Room
Shared: Puzzle · Adventure · Singleplayer

Little Inferno
Shared: Casual · Puzzle · Indie

TOEM: A Photo Adventure
Shared: Puzzle · Adventure · Casual

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

LEGO® Builder's Journey
Shared: Casual · Cute · Indie

FEZ
Shared: Puzzle · Indie · Adventure

LIMBO
Shared: Puzzle · Indie · Adventure

Slime Rancher 2
Shared: Cute · Singleplayer · Adventure

Assemble with Care
Shared: Casual · Puzzle · Indie