Games like Blockhead
Games like Blockhead include Peggle Deluxe, Plants vs. Zombies GOTY Edition, Bloons TD 6, Trine 2: Complete Story, and Braid. We matched them by the tags players give Blockhead on Steam (2D Platformer, Casual, Puzzle Platformer, Singleplayer, and Puzzle): closest matches first, and among equally close ones the better-known games.

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Casual · Singleplayer · Strategy

Bloons TD 6
Shared: Singleplayer · Strategy · Casual

Trine 2: Complete Story
Shared: Puzzle Platformer · 2D Platformer · Puzzle

Braid
Shared: 2D Platformer · Puzzle Platformer · Puzzle

Zuma Deluxe
Shared: Puzzle · Casual · Strategy

Trine Enchanted Edition
Shared: 2D Platformer · Puzzle Platformer · Family Friendly

Peggle™ Nights
Shared: Casual · Singleplayer · Puzzle

Scribblenauts Unlimited
Shared: Casual · Puzzle · Singleplayer

Monument Valley
Shared: Puzzle · Casual · Singleplayer

Bejeweled® 3
Shared: Casual · Puzzle · Singleplayer

Kingdom Rush - Tower Defense
Shared: Singleplayer · Strategy · Casual

Webbed
Shared: 2D Platformer · Puzzle Platformer · Exploration

Brawlhalla
Shared: 2D Platformer · Casual · 2D Fighter

Öoo
Shared: 2D Platformer · Puzzle Platformer · Puzzle

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Puzzle

ANTONBLAST
Shared: 2D Platformer · Singleplayer · 2D

Laughing to Die
Shared: Casual · 2D Platformer · Puzzle

Kingdom Rush Origins - Tower Defense
Shared: Singleplayer · Casual · Strategy

Zup!
Shared: Casual · Puzzle · Puzzle Platformer

Monument Valley 2
Shared: Casual · Puzzle · Strategy

FEZ
Shared: Puzzle · Singleplayer · Casual

KarmaZoo
Shared: Casual · 2D Platformer · Puzzle

Zup! S
Shared: Casual · Puzzle · Singleplayer