Games like Number Tower
Games like Number Tower include Kingdom Rush - Tower Defense, Zup! S, Kingdom Rush 5: Alliance TD, Zup!, and Gorogoa. We matched them by the tags players give Number Tower on Steam (Casual, Puzzle, 2D, Cartoon, and Cartoony): closest matches first, and among equally close ones the better-known games.

Kingdom Rush - Tower Defense
Shared: 2D · Casual · Fantasy

Zup! S
Shared: Casual · Puzzle · 2D

Kingdom Rush 5: Alliance TD
Shared: 2D · Cartoon · Cartoony

Zup!
Shared: Casual · Puzzle · 2D

Gorogoa
Shared: Puzzle · Casual · Indie

Zup! 2
Shared: Casual · Puzzle · 2D

Zup! F
Shared: Casual · Puzzle · 2D

Storyteller
Shared: Puzzle · 2D · Casual

Melvor Idle
Shared: Casual · 2D · Indie

Zup! X
Shared: Casual · Puzzle · 2D

Bendy and the Ink Machine
Shared: Puzzle · Cartoony · Cartoon

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

Zup! 3
Shared: Casual · Puzzle · 2D

Moncage
Shared: Casual · Puzzle · Indie

Kingdom Rush Origins - Tower Defense
Shared: 2D · Casual · Cartoony

Hexcells
Shared: Casual · Puzzle · Indie

Scribblenauts Unlimited
Shared: Casual · Puzzle · 2D

Peggle Deluxe
Shared: Casual · Puzzle · 2D

CHUCHEL
Shared: Casual · Cartoon · 2D

Kingdom Rush Vengeance - Tower Defense
Shared: 2D · Cartoon · Singleplayer

Baba Is You
Shared: Puzzle · Indie · 2D

World of Goo
Shared: Puzzle · Casual · 2D

Zup! 8
Shared: Casual · Puzzle · 2D

Hook
Shared: Casual · Puzzle · 2D