Games like BallMan++
Games like BallMan++ include Broforce, Shovel Knight: Treasure Trove, BlazBlue Entropy Effect, Duck Game, and Vampire Survivors. We matched them by the tags players give BallMan++ on Steam (Platformer, Action, Arcade, 2D, and 1990's): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Platformer · 2D

Shovel Knight: Treasure Trove
Shared: Platformer · Pixel Graphics · 2D

BlazBlue Entropy Effect
Shared: Action · 2D · Platformer

Duck Game
Shared: Action · Platformer · 2D

Vampire Survivors
Shared: 2D · Pixel Graphics · Arcade

Pizza Tower
Shared: Platformer · Pixel Graphics · Action

SANABI
Shared: Action · Pixel Graphics · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics

Dungeon Munchies
Shared: Action · Pixel Graphics · 2D

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

The Messenger
Shared: Platformer · 2D · Pixel Graphics

Rogue Legacy 2
Shared: Platformer · Arcade · Action

Exit the Gungeon
Shared: Arcade · Action · 2D

SUPER CHICKEN JUMPER
Shared: Arcade · 2D · Pixel Graphics

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · 2D · Action

Sonic Mania
Shared: Platformer · 2D · Pixel Graphics

Tcheco in the Castle of Lucio
Shared: Action · Platformer · Pixel Graphics

Downwell
Shared: Platformer · Pixel Graphics · Arcade

Rogue Legacy
Shared: Platformer · Action · 2D

Angry Video Game Nerd Adventures
Shared: Platformer · Action · Pixel Graphics

BALL x PIT
Shared: Action · Arcade · Pixel Graphics

UFO 50
Shared: Action · Pixel Graphics · 2D

Out There Somewhere
Shared: Platformer · Pixel Graphics · 2D

Gunpoint
Shared: 2D · Action · Pixel Graphics