Games like PumpKin Majo
Games like PumpKin Majo include Kao the Kangaroo: Round 2 (2003 re-release), SANABI, Planet of Lana, Sonic Origins, and Sonic Superstars. We matched them by the tags players give PumpKin Majo on Steam (Action, Casual, Adventure, Racing, and Platformer): closest matches first, and among equally close ones the better-known games.

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

SANABI
Shared: Action · Adventure · 2D Platformer

Planet of Lana
Shared: Action · 2D Platformer · Adventure

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Sonic Superstars
Shared: Action · Adventure · Casual

Super Fancy Pants Adventure
Shared: Action · Adventure · Casual

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

BEEP
Shared: Adventure · Platformer · Action

Minimalism
Shared: Casual · Action · Adventure

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

Grand Theft Auto V Legacy
Shared: Action · Adventure · Singleplayer

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure

Need for Speed™ Heat
Shared: Racing · Action · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

Pikuniku
Shared: Casual · Adventure · Indie

Hollow Knight
Shared: Platformer · Singleplayer · Indie

Super Bernie World
Shared: Action · Adventure · Indie

Celeste
Shared: Platformer · 2D Platformer · Indie

Rogue Legacy 2
Shared: Action · Platformer · Adventure

Brawlhalla
Shared: Casual · 2D Platformer · Platformer

Seen
Shared: Adventure · Indie · Singleplayer

Tomb Raider Game of the Year
Shared: Action · Adventure · Singleplayer

Need for Speed™ Unbound
Shared: Racing · Action · Singleplayer

Katana ZERO
Shared: Action · Platformer · 2D Platformer