Games like Flat Galaxy: An Idlemare
Games like Flat Galaxy: An Idlemare include A Dance of Fire and Ice, Windowkill, Sayonara Wild Hearts, Super Hexagon, and Geometry Dash. We matched them by the tags players give Flat Galaxy: An Idlemare on Steam (Action, Arcade, 2D, Singleplayer, and Short): closest matches first, and among equally close ones the better-known games.

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

Windowkill
Shared: Action · Arcade · 2D

Sayonara Wild Hearts
Shared: Action · Arcade · Singleplayer

Super Hexagon
Shared: Arcade · Singleplayer · Action

Geometry Dash
Shared: 2D · Singleplayer · Arcade

Orbt XL
Shared: Arcade · 2D · Action

Vampire Survivors
Shared: 2D · Singleplayer · Arcade

BIT.TRIP RUNNER
Shared: Action · Singleplayer · 2D

Need for Speed™ Heat
Shared: Action · Singleplayer · Arcade

Exit the Gungeon
Shared: Arcade · Action · 2D

Rogue Legacy 2
Shared: Arcade · Action · Singleplayer

LIMBO
Shared: 2D · Singleplayer · Atmospheric

BALL x PIT
Shared: Action · Arcade · 2D

pureya
Shared: Arcade · 2D · Singleplayer

PAC-MAN™ Championship Edition DX+
Shared: Arcade · Action · 2D

Ori and the Will of the Wisps
Shared: Action · Singleplayer · Atmospheric

Townscaper
Shared: Short · Experimental · Singleplayer

METAL GEAR SOLID V: GROUND ZEROES
Shared: Action · Singleplayer · Short

SUPERHOT
Shared: Action · Singleplayer · Minimalist

TEKKEN 7
Shared: Action · Arcade · Singleplayer

Gorogoa
Shared: Singleplayer · Atmospheric · Short

Hollow Knight
Shared: 2D · Singleplayer · Atmospheric

METAL SLUG
Shared: Action · Arcade · 2D

DJMAX RESPECT V
Shared: Action · Singleplayer · 2D