Games like Smashometry
Games like Smashometry include Geometry Dash, A Dance of Fire and Ice, Super Hexagon, Orbt XL, and Rogue Legacy 2. We matched them by the tags players give Smashometry on Steam (Difficult, Score Attack, Action, Arcade, and Colorful): closest matches first, and among equally close ones the better-known games.

Geometry Dash
Shared: Difficult · 2D · Singleplayer

A Dance of Fire and Ice
Shared: Difficult · Singleplayer · Arcade

Super Hexagon
Shared: Difficult · Arcade · Action

Orbt XL
Shared: Difficult · Arcade · Action

Rogue Legacy 2
Shared: Arcade · Action · Difficult

Super Meat Boy
Shared: Difficult · 2D · Singleplayer

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

Hollow Knight: Silksong
Shared: Difficult · 2D · Singleplayer

Hollow Knight
Shared: Difficult · 2D · Singleplayer

Celeste
Shared: Difficult · Singleplayer · 2D

Timberman
Shared: Action · Difficult · 2D

SUPER CHICKEN JUMPER
Shared: Difficult · Arcade · 2D

Super Meat Boy Forever
Shared: Difficult · Action · Indie

Rift of the NecroDancer
Shared: Difficult · Arcade · Action

Vampire Survivors
Shared: 2D · Singleplayer · Arcade

pureya
Shared: Arcade · 2D · Colorful

Electronic Super Joy
Shared: Difficult · Action · Singleplayer

Cuphead
Shared: Difficult · 2D · Action

Bit Blaster XL
Shared: Difficult · Arcade · Action

Exit the Gungeon
Shared: Arcade · Action · Difficult

Jump King
Shared: Difficult · Action · 2D

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

SANABI
Shared: Action · Singleplayer · 2D

Spin Rhythm XD
Shared: Difficult · Action · Arcade