Games like Ducky Bouncy
Games like Ducky Bouncy include Celeste, Super Meat Boy, Geometry Dash, Hollow Knight, and Hollow Knight: Silksong. We matched them by the tags players give Ducky Bouncy on Steam (Racing, Precision Platformer, 2D Platformer, Difficult, and Indie): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Indie

Super Meat Boy
Shared: Precision Platformer · Difficult · 2D Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Hollow Knight
Shared: Difficult · Platformer · Indie

Hollow Knight: Silksong
Shared: Difficult · Indie · Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Indie

Jump King
Shared: Precision Platformer · Difficult · Indie

Rain World
Shared: Difficult · Indie · Platformer

Cuphead
Shared: Difficult · Platformer · Indie

Downwell
Shared: Precision Platformer · Indie · 2D Platformer

Pizza Tower
Shared: 2D Platformer · Indie · Platformer

The End Is Nigh
Shared: Precision Platformer · Difficult · Indie

Nine Sols
Shared: Difficult · Platformer · Hand-drawn

Thank Goodness You're Here!
Shared: Hand-drawn · 2D Platformer · Indie

Getting Over It with Bennett Foddy
Shared: Difficult · Indie · Platformer

Super Meat Boy Forever
Shared: Precision Platformer · Difficult · Indie

SANABI
Shared: 2D Platformer · Indie · 2D

GRIS
Shared: Indie · Hand-drawn · Platformer

Spelunky 2
Shared: 2D Platformer · Difficult · Platformer

SpeedRunners
Shared: Racing · Indie · Platformer

BEEP
Shared: Indie · Platformer · 2D

MIO: Memories in Orbit
Shared: Platformer · Indie · Difficult

JellyCar Worlds
Shared: Racing · 2D Platformer · Precision Platformer

Braid
Shared: 2D Platformer · Indie · Platformer