Games like PuppeTNetiK - Speedrun Challenge
Games like PuppeTNetiK - Speedrun Challenge include Celeste, Geometry Dash, BIT.TRIP Presents... Runner2: Future Legend of Rhythm Alien, Super Meat Boy, and Pogostuck: Rage With Your Friends. We matched them by the tags players give PuppeTNetiK - Speedrun Challenge on Steam (Side Scroller, Precision Platformer, Runner, 2D Platformer, and Parkour): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · 2D Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

BIT.TRIP Presents... Runner2: Future Legend of Rhythm Alien
Shared: Side Scroller · Precision Platformer · Runner

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

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Difficult · Side Scroller

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

Prince of Persia The Lost Crown
Shared: Side Scroller · 2D Platformer · Precision Platformer

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Only Climb: Better Together
Shared: Precision Platformer · Difficult · Platformer

I wanna be the Creator
Shared: Precision Platformer · Platformer · Difficult

Thomas Was Alone
Shared: Side Scroller · Precision Platformer · 2D Platformer

SANABI
Shared: 2D Platformer · Adventure · Action

A Difficult Game About Climbing
Shared: Precision Platformer · Difficult · Platformer

Rogue Legacy 2
Shared: Arcade · Platformer · Difficult

Will You Snail?
Shared: Precision Platformer · Difficult · 2D Platformer

N++ (NPLUSPLUS)
Shared: Precision Platformer · 2D Platformer · Difficult

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Difficult

Jump King
Shared: Precision Platformer · Difficult · Platformer

GuGu Pizza : Delivering Pizza to the Space Station? Boss, this is just not right!
Shared: Side Scroller · 2D Platformer · Platformer

Laika: Aged Through Blood
Shared: 2D Platformer · Arcade · Side Scroller

!AnyWay!
Shared: Side Scroller · Precision Platformer · 2D Platformer

Soda Crisis
Shared: Side Scroller · Runner · Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

This Is No Cave
Shared: Precision Platformer · Side Scroller · 2D Platformer