Games like BallHole
Games like BallHole include Garry's Mod, SUMMERHOUSE, Bloons TD 6, Cookie Clicker, and People Playground. We matched them by the tags players give BallHole on Steam (Casual, Idler, Sandbox, Psychedelic, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Casual · Physics

SUMMERHOUSE
Shared: Sandbox · Casual · Pixel Graphics

Bloons TD 6
Shared: Casual · Sandbox · 3D

Cookie Clicker
Shared: Idler · Casual · Pixel Graphics

People Playground
Shared: Sandbox · Pixel Graphics · Physics

Cast n Chill
Shared: Idler · Pixel Graphics · Casual

Townscaper
Shared: Sandbox · Casual · Stylized

GoreBox
Shared: Sandbox · Stylized · Casual

PowerWash Simulator
Shared: Casual · Sandbox · 3D

Lucid Blocks
Shared: Psychedelic · Sandbox · Atmospheric

Stardew Valley
Shared: Pixel Graphics · Sandbox · Casual

Garden Galaxy
Shared: Idler · Sandbox · Casual

Goat Simulator 3
Shared: Sandbox · Casual · 3D

Fireworks Mania - An Explosive Simulator
Shared: Sandbox · 3D · Casual

Tiny Pasture
Shared: Idler · Casual · Pixel Graphics

Chill with You : Lo-Fi Story
Shared: Casual · Idler · Atmospheric

Chill Pulse
Shared: Casual · Idler · Pixel Graphics

Fortune Mill
Shared: Idler · Pixel Graphics · Casual

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer

SpaceEngine
Shared: Casual · Sandbox · 3D

Hozy
Shared: Casual · Sandbox · 3D

Trove
Shared: Sandbox · Pixel Graphics · Casual

STANDBOX
Shared: Sandbox · Casual · 3D

Kaze and the Wild Masks
Shared: Casual · 1990's · Pixel Graphics