Build walls around bouncing sparks and capture the target area across 12 original JezzBall-style stages. Each attempt has three lives; cleared stages, medals and selected stage save in the browser.
Sparkseal was submitted to SlowDen by Goblin Arcade. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-09-13. It runs in the browser with no download, no install and no sign-up.