Games like PlanckMan
Games like PlanckMan include Zuma Deluxe, Peggle Deluxe, Razortron 2000, Zup!, and Strange Jigsaws. We matched them by the tags players give PlanckMan on Steam (Arcade, Casual, 2D, Puzzle, and 1980s): closest matches first, and among equally close ones the better-known games.

Zuma Deluxe
Shared: Arcade · Puzzle · 2D

Peggle Deluxe
Shared: Casual · Arcade · Puzzle

Razortron 2000
Shared: Casual · Arcade · 1980s

Zup!
Shared: Casual · Puzzle · 2D

Strange Jigsaws
Shared: Casual · 2D · Puzzle

Progressbar95
Shared: Arcade · Casual · Puzzle

Zup! S
Shared: Casual · Puzzle · 2D

Nodebuster
Shared: Casual · Arcade · 2D

Hook
Shared: Casual · Puzzle · Minimalist

UFO 50
Shared: Arcade · 2D · Pixel Graphics

Zup! F
Shared: Casual · Puzzle · 2D

Baba Is You
Shared: Puzzle · Pixel Graphics · 2D

Webbed
Shared: Pixel Graphics · 2D · Exploration

FEZ
Shared: Puzzle · Pixel Graphics · Casual

Zup! X
Shared: Casual · Puzzle · 2D

Cat Goes Fishing
Shared: 2D · Casual · Puzzle

Zup! 7
Shared: Casual · Puzzle · 2D

Vampire Survivors
Shared: 2D · Pixel Graphics · Casual

Zup! 3
Shared: Casual · Puzzle · 2D

Zup! 2
Shared: Casual · Puzzle · 2D

RetroMaze
Shared: Casual · Puzzle · 2D

ANIMAL WELL
Shared: Puzzle · Pixel Graphics · 2D

Shelldiver
Shared: Casual · Arcade · 2D

Zup! 8
Shared: Casual · Puzzle · 2D