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

Braid
Shared: Puzzle · Puzzle Platformer · 2D Platformer

LIMBO
Shared: Puzzle · Puzzle Platformer · Platformer

Defy Gravity Extended
Shared: Platformer · Puzzle · Puzzle Platformer

FEZ
Shared: Puzzle · Platformer · Casual

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

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

Portal 2
Shared: Puzzle · Platformer · Puzzle Platformer

Laughing to Die
Shared: Casual · Puzzle · Platformer

Nihilumbra
Shared: Platformer · Puzzle · Casual

Hue
Shared: Puzzle · Platformer · Puzzle Platformer

Munin
Shared: Casual · Puzzle · Puzzle Platformer

Zup!
Shared: Casual · Puzzle · 2D

Toki Tori
Shared: Puzzle · Casual · Platformer

Zup! S
Shared: Casual · Puzzle · 2D

Zup! F
Shared: Casual · Puzzle · 2D

Zup! 2
Shared: Casual · Puzzle · 2D

Zup! X
Shared: Casual · Puzzle · 2D

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

Celeste
Shared: Platformer · 2D Platformer · Indie

Zup! 3
Shared: Casual · Puzzle · 2D

BEEP
Shared: Platformer · Puzzle · Indie

Pikuniku
Shared: Casual · Puzzle · Indie

Öoo
Shared: Puzzle · Puzzle Platformer · 2D Platformer

Zup! 8
Shared: Casual · Puzzle · 2D