Games like Downroll
Games like Downroll include There Is No Game: Wrong Dimension, That's not my Neighbor, Melvor Idle, Gorogoa, and Florence. We matched them by the tags players give Downroll on Steam (Casual, Adventure, Point & Click, 2D Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

There Is No Game: Wrong Dimension
Shared: Point & Click · Adventure · Indie

That's not my Neighbor
Shared: Casual · Adventure · Point & Click

Melvor Idle
Shared: Casual · Adventure · Singleplayer

Gorogoa
Shared: Casual · Indie · Singleplayer

Florence
Shared: Casual · Adventure · Indie

Broken Age
Shared: Adventure · Point & Click · Indie

Thank Goodness You're Here!
Shared: Adventure · Casual · 2D Platformer

The Room
Shared: Point & Click · Adventure · Singleplayer

Deponia
Shared: Adventure · Point & Click · Singleplayer

Papers, Please
Shared: Point & Click · Indie · Singleplayer

Lil' Guardsman
Shared: Adventure · Casual · Point & Click

Gomo
Shared: Adventure · Point & Click · Casual

SANABI
Shared: Adventure · 2D Platformer · Singleplayer

McPixel 3
Shared: Adventure · Point & Click · Casual

Morphopolis
Shared: Casual · Point & Click · Adventure

Game Dev Tycoon
Shared: Casual · Indie · Singleplayer

Hidden Folks
Shared: Casual · Point & Click · Indie

DAVE THE DIVER
Shared: Casual · Adventure · Singleplayer

Storyteller
Shared: Point & Click · Adventure · 2D

Chants of Sennaar
Shared: Adventure · Point & Click · Singleplayer

My Brother Rabbit
Shared: Adventure · Point & Click · Singleplayer

Zup! 2
Shared: Casual · 2D · Indie

Celeste
Shared: 2D Platformer · Indie · Singleplayer

Strange Jigsaws
Shared: Casual · Adventure · 2D