Games like Squingle
Games like Squingle include Moncage, Portal, Viewfinder, LIMBO, and Manifold Garden. We matched them by the tags players give Squingle on Steam (Puzzle, Casual, Surreal, Puzzle Platformer, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Moncage
Shared: Puzzle · Casual · Surreal

Portal
Shared: Puzzle · Puzzle Platformer · Singleplayer

Viewfinder
Shared: Puzzle · Puzzle Platformer · Surreal

LIMBO
Shared: Puzzle · Puzzle Platformer · Atmospheric

Manifold Garden
Shared: Puzzle · Surreal · Puzzle Platformer

The Swapper
Shared: Puzzle · Atmospheric · Puzzle Platformer

COCOON
Shared: Puzzle · Puzzle Platformer · Atmospheric

Monument Valley 3
Shared: Casual · Puzzle · Atmospheric

Defy Gravity Extended
Shared: Puzzle · Puzzle Platformer · Casual

FORM
Shared: VR · Atmospheric · Singleplayer

The Bridge
Shared: Puzzle Platformer · Surreal · Puzzle

Garten of Banban
Shared: VR · Puzzle · Singleplayer

Portal 2
Shared: Puzzle · Singleplayer · Puzzle Platformer

Antichamber
Shared: Puzzle · Surreal · Singleplayer

Gorogoa
Shared: Puzzle · Casual · Atmospheric

Creaks
Shared: Puzzle · Surreal · Atmospheric

Little Nightmares
Shared: Atmospheric · Puzzle · Puzzle Platformer

SpaceEngine
Shared: Casual · Sci-fi · 3D

The Talos Principle
Shared: Puzzle · Atmospheric · Sci-fi

Zup! F
Shared: Puzzle · Casual · Puzzle Platformer

The Last Campfire
Shared: Puzzle · Singleplayer · Atmospheric

GRIS
Shared: Atmospheric · Singleplayer · Puzzle

Samorost 1
Shared: Casual · Surreal · Puzzle

World of Goo
Shared: Puzzle · Casual · Singleplayer