Games like CruxFlaw
Games like CruxFlaw include BALL x PIT, Super Hexagon, A Dance of Fire and Ice, Monsters are Coming!, and Vampire Survivors. We matched them by the tags players give CruxFlaw on Steam (Action, Score Attack, Arcade, Hack and Slash, and 2D): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Action · Arcade · 2D

Super Hexagon
Shared: Arcade · Action · Indie

A Dance of Fire and Ice
Shared: Arcade · 2D · Colorful

Monsters are Coming!
Shared: Action · Score Attack · Top-Down

Vampire Survivors
Shared: 2D · Action · Arcade

Orbt XL
Shared: Arcade · Action · 2D

Windowkill
Shared: Action · Arcade · 2D

PAC-MAN™ Championship Edition DX+
Shared: Arcade · Action · Score Attack

Skul: The Hero Slayer
Shared: Action · 2D · Indie

ICEY
Shared: Action · Hack and Slash · 2D

God of War
Shared: Action · Hack and Slash · Combat

Sky Force Reloaded
Shared: Arcade · Action · Top-Down

Hades
Shared: Hack and Slash · Action · Indie

The Mageseeker: A League of Legends Story™
Shared: Hack and Slash · 2D · Action

Bastion
Shared: Action · Hack and Slash · Indie

Timberman
Shared: Action · 2D · Arcade

Hotline Miami
Shared: Action · Top-Down · Indie

Streets of Rage 4
Shared: Action · 2D · Arcade

Hyper Light Drifter
Shared: Action · Hack and Slash · Indie

pureya
Shared: Arcade · 2D · Action

MARVEL Tōkon: Fighting Souls
Shared: Action · Arcade · 2D

Planes, Bullets and Vodka
Shared: Action · Arcade · 2D

Rogue Legacy 2
Shared: Arcade · Action · Indie

Geometry Dash
Shared: 2D · Colorful · Singleplayer