Games like TumbleBoy
Games like TumbleBoy include Geometry Dash, Peggle Deluxe, Vampire Survivors, Plants vs. Zombies GOTY Edition, and A Dance of Fire and Ice. We matched them by the tags players give TumbleBoy on Steam (Casual, Singleplayer, 2D, Precision Platformer, and Driving): closest matches first, and among equally close ones the better-known games.

Geometry Dash
Shared: 2D · Singleplayer · Precision Platformer

Peggle Deluxe
Shared: Casual · Singleplayer · 2D

Vampire Survivors
Shared: 2D · Singleplayer · Casual

Plants vs. Zombies GOTY Edition
Shared: Singleplayer · Casual · 2D

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

Timberman
Shared: Casual · 2D · Singleplayer

To The Core
Shared: Casual · 2D · Arcade

Garfield Kart
Shared: Driving · 2D · Arcade

DJMAX RESPECT V
Shared: Casual · Singleplayer · 2D

Feeding Frenzy 2 Deluxe
Shared: Casual · Singleplayer · 2D

Peggle™ Nights
Shared: Casual · Singleplayer · 2D

Need for Speed™ Unbound
Shared: Singleplayer · Driving · Casual

Razortron 2000
Shared: Casual · 2D · Singleplayer

pureya
Shared: Casual · 2D · Singleplayer

Space Rock Breaker
Shared: Casual · Singleplayer · Arcade

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: 2D · Casual · Arcade

Bloons TD 6
Shared: Singleplayer · Casual · 2D

Zup! S
Shared: Casual · 2D · Singleplayer

Shelldiver
Shared: Casual · 2D · Arcade

Zuma Deluxe
Shared: 2D · Casual · Arcade

Celeste
Shared: Precision Platformer · Singleplayer · 2D

Kingdom Rush - Tower Defense
Shared: Singleplayer · 2D · Casual

Cat Goes Fishing
Shared: 2D · Casual · Singleplayer

Downwell
Shared: Precision Platformer · Arcade · 2D