Games like PuzzleKid
Games like PuzzleKid include Braid, Trine 2: Complete Story, LIMBO, Zup!, and Zup! F. We matched them by the tags players give PuzzleKid on Steam (Indie, Casual, Puzzle Platformer, Puzzle, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Braid
Shared: Puzzle Platformer · Indie · Puzzle

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

LIMBO
Shared: Indie · Puzzle Platformer · Puzzle

Zup!
Shared: Casual · Indie · Puzzle

Zup! F
Shared: Casual · Indie · Puzzle

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

Zup! 2
Shared: Casual · Indie · Puzzle

Zup! X
Shared: Casual · Indie · Puzzle

Zup! 3
Shared: Casual · Indie · Puzzle

Defy Gravity Extended
Shared: Indie · Puzzle Platformer · Puzzle

Munin
Shared: Indie · Casual · Puzzle Platformer

Zup! Z
Shared: Indie · Casual · Puzzle

FEZ
Shared: Indie · Puzzle · Casual

Zup! 4
Shared: Casual · Indie · Puzzle

Zup! 8
Shared: Casual · Indie · Puzzle

Zup! S
Shared: Casual · Indie · Puzzle

Pikuniku
Shared: Indie · Casual · Puzzle

INSIDE
Shared: Puzzle Platformer · Indie · Puzzle

Hue
Shared: Indie · Puzzle · Puzzle Platformer

Zup! 5
Shared: Casual · Indie · Puzzle

Laughing to Die
Shared: Casual · Puzzle · 2D Platformer

Zup! Zero
Shared: Casual · Indie · Puzzle

Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Indie

Moncage
Shared: Casual · Indie · Puzzle