Games like Too Soon
Games like Too Soon include Neva, Papers, Please, Cookie Clicker, The Room, and Russian Life Simulator. We matched them by the tags players give Too Soon on Steam (2D Platformer, Simulation, Hidden Object, Incremental, and Idler): closest matches first, and among equally close ones the better-known games.

Neva
Shared: Adventure · 2D Platformer · Atmospheric

Papers, Please
Shared: Simulation · Indie · Puzzle

Cookie Clicker
Shared: Incremental · Idler · Indie

The Room
Shared: Puzzle · Hidden Object · Adventure

Russian Life Simulator
Shared: Simulation · Incremental · 2D

The Room Two
Shared: Hidden Object · Puzzle · Adventure

Shelldiver
Shared: Incremental · Idler · Simulation

Idle Champions of the Forgotten Realms
Shared: Idler · Incremental · Adventure

The Room Three
Shared: Puzzle · Adventure · Hidden Object

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

IGTAP: an Incremental Game That's Also a Platformer
Shared: 2D Platformer · Incremental · Idler

Nodebuster
Shared: Incremental · Simulation · Idler

The House of Da Vinci
Shared: Hidden Object · Puzzle · Adventure

Rusty Lake Paradise
Shared: Puzzle · Adventure · Indie

Dragon Cliff
Shared: Idler · Incremental · Adventure

SANABI
Shared: 2D Platformer · Adventure · 2D

Braid
Shared: 2D Platformer · Puzzle · 2D

Morphopolis
Shared: Hidden Object · Puzzle · Adventure

Malware
Shared: Simulation · Hidden Object · Puzzle

Horripilant
Shared: Incremental · Idler · Simulation

JudgeSim
Shared: Simulation · 2D · Text-Based

SchoolBoy Runaway
Shared: Simulation · Adventure · Puzzle

A Game About Feeding A Black Hole
Shared: Incremental · Simulation · Idler

Rain World
Shared: Atmospheric · 2D Platformer · 2D