Games like Lighten Up
Games like Lighten Up include Hook, Zup! S, klocki, Hexcells, and LYNE. We matched them by the tags players give Lighten Up on Steam (Puzzle, Casual, Logic, Relaxing, and Minimalist): closest matches first, and among equally close ones the better-known games.

Hook
Shared: Puzzle · Casual · Relaxing

Zup! S
Shared: Puzzle · Casual · Relaxing

klocki
Shared: Puzzle · Casual · Relaxing

Hexcells
Shared: Puzzle · Casual · Logic

LYNE
Shared: Puzzle · Logic · Relaxing

Strange Jigsaws
Shared: Casual · Puzzle · Logic

Hexcells Infinite
Shared: Puzzle · Casual · Logic

Patrick's Parabox
Shared: Puzzle · Logic · Minimalist

Is This Seat Taken?
Shared: Puzzle · Casual · Relaxing

Baba Is You
Shared: Puzzle · Logic · Singleplayer

Hexcells Plus
Shared: Puzzle · Casual · Logic

Zup!
Shared: Puzzle · Casual · Relaxing

Zup! F
Shared: Puzzle · Casual · Relaxing

Zup! 2
Shared: Puzzle · Casual · Relaxing

Mini Metro
Shared: Puzzle · Minimalist · Casual

Zup! X
Shared: Puzzle · Casual · Relaxing

A Little to the Left
Shared: Puzzle · Relaxing · Casual

Zup! 3
Shared: Puzzle · Casual · Relaxing

Zenge
Shared: Puzzle · Casual · Relaxing

Mini Motorways
Shared: Casual · Puzzle · Minimalist

Delete
Shared: Casual · Puzzle · Minimalist

Dorfromantik
Shared: Puzzle · Casual · Relaxing

Zup! 5
Shared: Puzzle · Casual · Relaxing

Zup! 8
Shared: Puzzle · Casual · Relaxing