Games like Music Man
Games like Music Man include Portal 2, Pikuniku, Kao the Kangaroo: Round 2 (2003 re-release), Spyro™ Reignited Trilogy, and Ori and the Will of the Wisps. We matched them by the tags players give Music Man on Steam (Adventure, Action, Casual, Platformer, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle · Adventure

Pikuniku
Shared: Adventure · Casual · Puzzle

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Action · Casual

Spyro™ Reignited Trilogy
Shared: Adventure · Action · 3D Platformer

Ori and the Will of the Wisps
Shared: Platformer · Action · Adventure

Pumpkin Jack
Shared: Adventure · Action · 3D Platformer

Sonic Frontiers
Shared: Adventure · Action · 3D Platformer

A Hat in Time
Shared: Adventure · 3D Platformer · Collectathon

Yooka-Laylee
Shared: Adventure · 3D Platformer · Platformer

A Story About My Uncle
Shared: Adventure · Platformer · 3D Platformer

Chained Together
Shared: Adventure · Casual · Platformer

Human Fall Flat
Shared: Adventure · Puzzle · Action

BEEP
Shared: Adventure · Platformer · Action

Psychonauts
Shared: Adventure · Platformer · Action

Spirit of the North
Shared: Adventure · Casual · Puzzle

Sonic Adventure DX
Shared: Adventure · Platformer · Action

Sonic Adventure 2
Shared: Action · Adventure · Platformer

LIMBO
Shared: Platformer · Puzzle · Adventure

ATLYSS
Shared: Adventure · Action · 3D Platformer

Planet of Lana
Shared: Action · Adventure · Puzzle

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: Adventure · Action · 3D Platformer

Forward to the Sky
Shared: Action · Adventure · Casual

Toree 2
Shared: Action · Adventure · Platformer

Donut County
Shared: Casual · Adventure · Puzzle