Games like JumpKin
Games like JumpKin include Sonic Superstars, Brawlhalla, SANABI, Ori and the Will of the Wisps, and Pikuniku. We matched them by the tags players give JumpKin on Steam (Action, Casual, Adventure, 2D Fighter, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Sonic Superstars
Shared: Action · Adventure · Casual

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

SANABI
Shared: Action · Adventure · 2D Platformer

Ori and the Will of the Wisps
Shared: Action · Platformer · Adventure

Pikuniku
Shared: Casual · Adventure · Action

Hollow Knight
Shared: Platformer · 2D · Adventure

BlazBlue Entropy Effect
Shared: Action · Action-Adventure · 2D

Super Fancy Pants Adventure
Shared: Action · Adventure · Casual

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Laughing to Die
Shared: Casual · Adventure · Platformer

Thank Goodness You're Here!
Shared: Adventure · Casual · Hand-drawn

Trine 5: A Clockwork Conspiracy
Shared: Action · Adventure · Action-Adventure

HerrAnwalt: Lawyers Legacy
Shared: Action · Casual · Adventure

Hoa
Shared: 2D Platformer · Action-Adventure · Hand-drawn

Planet of Lana
Shared: Action · 2D Platformer · Adventure

Nine Sols
Shared: Action · Platformer · 2D

Pumpkin Jack
Shared: Action · Adventure · Colorful

Constance
Shared: Action · Platformer · Action-Adventure

The Darkest Tales — Into the Nightmare
Shared: Adventure · Action-Adventure · Platformer

GRIS
Shared: Adventure · Platformer · Hand-drawn

Webbed
Shared: 2D Platformer · Platformer · Cute

Tribal Hunter
Shared: Action · Casual · Action-Adventure

Well Dweller
Shared: Action · Action-Adventure · Adventure

Neva
Shared: Adventure · Platformer · 2D Platformer