Games like Spunk and Moxie
Games like Spunk and Moxie include Celeste, Hollow Knight: Silksong, Defy Gravity Extended, Planet of Lana, and Hollow Knight. We matched them by the tags players give Spunk and Moxie on Steam (Action, Indie, Platformer, Family Friendly, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Indie · Platformer · Difficult

Hollow Knight: Silksong
Shared: Indie · Difficult · Platformer

Defy Gravity Extended
Shared: Indie · Platformer · Puzzle Platformer

Planet of Lana
Shared: Action · Puzzle Platformer · Female Protagonist

Hollow Knight
Shared: Platformer · Indie · Difficult

LIMBO
Shared: Indie · Puzzle Platformer · Platformer

Skul: The Hero Slayer
Shared: Action · Indie · Platformer

Portal 2
Shared: Platformer · Puzzle Platformer · Female Protagonist

Cuphead
Shared: Platformer · Difficult · Indie

Katana ZERO
Shared: Action · Platformer · Indie

Iconoclasts
Shared: Indie · Action · Female Protagonist

Nine Sols
Shared: Action · Platformer · Difficult

Risk of Rain (2013)
Shared: Indie · Action · Platformer

MO:Astray
Shared: Action · Indie · Platformer

Freedom Planet
Shared: Action · Platformer · Indie

Geometry Dash
Shared: Difficult · Platformer · Indie

Bleed
Shared: Action · Indie · Platformer

Super Meat Boy Forever
Shared: Indie · Action · Platformer

Super Meat Boy
Shared: Platformer · Indie · Difficult

Rogue Legacy 2
Shared: Action · Platformer · Indie

Toki Tori
Shared: Indie · Platformer · Family Friendly

Haydee
Shared: Female Protagonist · Action · Platformer

Trine 5: A Clockwork Conspiracy
Shared: Action · Platformer · Puzzle Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Action