Games like Boom and Rum
Games like Boom and Rum include Zuma's Revenge!, Waveform, Sizeable, Zup! S, and Megabonk. We matched them by the tags players give Boom and Rum on Steam (Puzzle, Arcade, Indie, 3D, and Top-Down): closest matches first, and among equally close ones the better-known games.

Zuma's Revenge!
Shared: Puzzle · Action · Casual

Waveform
Shared: Puzzle · Indie · Arcade

Sizeable
Shared: Puzzle · Indie · Casual

Zup! S
Shared: Puzzle · Indie · Casual

Megabonk
Shared: Indie · Action · Arcade

I, Zombie
Shared: Puzzle · Top-Down · Indie

Moncage
Shared: Puzzle · Indie · Casual

Peggle Deluxe
Shared: Puzzle · Arcade · Casual

Timberman
Shared: Indie · Casual · Arcade

Baba Is You
Shared: Puzzle · Indie · Singleplayer

Donut County
Shared: Indie · Puzzle · Casual

Zup!
Shared: Puzzle · Indie · Casual

Defy Gravity Extended
Shared: Puzzle · Indie · Action

Millie
Shared: Indie · Puzzle · Casual

Marble Mayhem: Fragile Ball
Shared: Puzzle · Indie · Casual

Trip to Vinelands
Shared: Indie · Arcade · Action

Vampire Survivors
Shared: Indie · Arcade · Singleplayer

Gorogoa
Shared: Puzzle · Indie · Casual

Cyberhunt
Shared: Indie · Action · Arcade

There Is No Game: Wrong Dimension
Shared: Puzzle · Indie · Casual

SUPERHOT
Shared: Action · Indie · Puzzle

RetroMaze
Shared: Indie · Puzzle · Casual

Puyo Puyo™ Tetris® 2
Shared: Puzzle · Arcade · Action

Little Inferno
Shared: Puzzle · Indie · Casual