Readable at 100 pixels
Store icons render tiny. The winning pattern: one central character or object, high contrast against the background, a bright rim or outline, and a maximum of 2–3 words of text (or none). Check your icon at thumbnail size before uploading — if the message dies at small scale, simplify.
The repeatable formula
Top games iterate the same icon layout with escalating drama: same characters, same framing, higher stakes (more explosions, rarer item, newer badge). Consistency builds brand recognition in the discovery feed, and players returning to your page should recognize the icon instantly.
Technical and honesty rules
Upload at 512×512 minimum (the platform accepts up to 1024), avoid near-white edges (they vanish on light backgrounds), and never fake content the game does not contain — misleading icons convert the first click and then mass-negative-review your retention. The icon sells the session; the game sells the icon’s promise.