Games like TimeNot
Games like TimeNot include Anomaly Agent, Celeste, SANABI, Rogue Legacy 2, and Thomas Was Alone. We matched them by the tags players give TimeNot on Steam (Side Scroller, Precision Platformer, 2D Platformer, Puzzle Platformer, and Roguelite): closest matches first, and among equally close ones the better-known games.

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Celeste
Shared: Precision Platformer · 2D Platformer · Platformer

SANABI
Shared: 2D Platformer · Action · Side Scroller

Rogue Legacy 2
Shared: Arcade · Platformer · Roguelite

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

Skul: The Hero Slayer
Shared: Roguelite · Roguelike · Side Scroller

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

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Blade Assault
Shared: 2D Platformer · Side Scroller · Platformer

Rogue Legacy
Shared: Platformer · Roguelike · Side Scroller

Trine 2: Complete Story
Shared: Puzzle Platformer · 2D Platformer · Platformer

30XX
Shared: Side Scroller · 2D Platformer · Roguelite

Geometry Dash
Shared: Precision Platformer · Platformer · 2D

Vampire Survivors
Shared: Roguelite · 2D · Roguelike

LIMBO
Shared: Puzzle Platformer · Platformer · Side Scroller

Dead Cells
Shared: Roguelike · Roguelite · Adventure

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

Songs for a Hero - Definitive Edition
Shared: 2D Platformer · Platformer · Puzzle Platformer

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

Trine Enchanted Edition
Shared: Puzzle Platformer · 2D Platformer · Action-Adventure

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

20XX
Shared: 2D Platformer · Platformer · Roguelite

Broforce
Shared: Side Scroller · Platformer · 2D

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Platformer