Games like Groov
Games like Groov include Beat Hazard, A Dance of Fire and Ice, Geometry Dash, Super Hexagon, and Muse Dash. We matched them by the tags players give Groov on Steam (Action, Shooter, Rhythm, Twin Stick Shooter, and 2D): closest matches first, and among equally close ones the better-known games.

Beat Hazard
Shared: Rhythm · Twin Stick Shooter · 2D

A Dance of Fire and Ice
Shared: Rhythm · Indie · 2D

Geometry Dash
Shared: Rhythm · 2D · Music

Super Hexagon
Shared: Indie · Rhythm · Action

Muse Dash
Shared: Rhythm · Music · 2D

Melatonin
Shared: Rhythm · Indie · Colorful

Rhythm Doctor
Shared: Rhythm · Action · Indie

Beat Hazard 2
Shared: Rhythm · Twin Stick Shooter · Indie

Rift of the NecroDancer
Shared: Rhythm · Action · Indie

Just Shapes & Beats
Shared: Rhythm · Action · 2D

Cyberhunt
Shared: Action · Indie · Twin Stick Shooter

Music Racer
Shared: Rhythm · Action · Indie

DJMAX RESPECT V
Shared: Rhythm · Action · 2D

12 is Better Than 6
Shared: Action · Shooter · Indie

Halo: Spartan Assault
Shared: Action · Shooter · Twin Stick Shooter

Windowkill
Shared: Action · Indie · 2D

Pistol Whip
Shared: Action · Rhythm · Shooter

My Friend Pedro
Shared: Action · Shooter · Indie

BPM: BULLETS PER MINUTE
Shared: Rhythm · Action · Shooter

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

AudioSurf
Shared: Rhythm · Indie · Colorful

Spin Rhythm XD
Shared: Rhythm · Action · Indie

Broforce
Shared: Action · 2D · Shooter

SUPERHOT
Shared: Action · Shooter · Indie