Games like Downwell
Games like Downwell include Celeste, Super Meat Boy, Skul: The Hero Slayer, Vampire Survivors, and The Binding of Isaac: Rebirth. We matched them by the tags players give Downwell on Steam (Precision Platformer, Pixel Graphics, Action Roguelike, Indie, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Pixel Graphics · Indie

Super Meat Boy
Shared: Precision Platformer · Platformer · Indie

Skul: The Hero Slayer
Shared: Indie · Action Roguelike · Pixel Graphics

Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · Indie

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Pixel Graphics

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Indie

SANABI
Shared: Pixel Graphics · Action · 2D Platformer

Katana ZERO
Shared: Pixel Graphics · Platformer · Action

Jump King
Shared: Precision Platformer · Pixel Graphics · Indie

Pizza Tower
Shared: Indie · 2D Platformer · Pixel Graphics

Risk of Rain (2013)
Shared: Action Roguelike · Indie · Pixel Graphics

Dead Cells
Shared: Action Roguelike · Pixel Graphics · 2D

Rogue Legacy
Shared: Platformer · Action Roguelike · Indie

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Indie

Spelunky
Shared: Action Roguelike · Platformer · Indie

Geometry Dash
Shared: Precision Platformer · Difficult · Platformer

BlazBlue Entropy Effect
Shared: Action Roguelike · Pixel Graphics · Platformer

Dungreed
Shared: Pixel Graphics · Action Roguelike · Indie

Rogue Legacy 2
Shared: Arcade · Platformer · Indie

UFO 50
Shared: Pixel Graphics · Indie · Arcade

Enter the Gungeon
Shared: Action Roguelike · Pixel Graphics · Indie

Noita
Shared: Pixel Graphics · Indie · Difficult

Megabonk
Shared: Action Roguelike · Indie · Pixel Graphics

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