Design install and browser modes
For a game product manager, this inventory delivery prototype should make every player action and player-visible outcome easy to evaluate. Write how to connect successful purchase to a visible owned or quantity state. Define the player need, item scope, ownership rule, Koin price, and free path. Check age context, accessibility, rights, and platform expectations. Try the flow in a regular tab and an installed presentation. Navigation, focus, and recovery should remain understandable even when browser controls are reduced or the app resumes from suspension.
Treat offline state explicitly
An unavailable connection must not look like a completed purchase. Explain when the action cannot continue, preserve the game state, and provide a safe retry after connectivity returns.
Do not imply native entitlement
PWA installation does not create platform IAP ownership. Durable identity, cross-device state, refunds, billing integration, and app-store policy remain outside the browser prototype.
Write the decision before the feature
State which player problem the item addresses, why a purchase is appropriate, and what evidence would cause the team to drop the idea. The prototype supports a product decision; it does not forecast revenue.
Compare free and owned journeys
Ask testers to complete the same goal with and without the item. Look for comprehension, pressure, fairness, and delivered value rather than using purchase completion as the only measure of a good experience.
Set the release boundary
Review age context, accessibility, localization, rights, moderation, platform policy, refunds, support, and security with the responsible owners. Keep unverified native capabilities and financial reporting out of the public promise.
Connect success to the item
A success message is not delivery. Place the cosmetic, consumable, unlock, or upgrade in the screen where the player expects to use it. Test that behavior using PWA games. PWA packaging does not create native platform IAP entitlements.
Show ownership and quantity
Use owned, equipped, unlocked, or remaining quantity as appropriate. The state should match the promise made on the offer card. Test that behavior using PWA games. PWA packaging does not create native platform IAP entitlements.
Verify delivery after reload
Reload the prototype and return to inventory. The item should remain visible without subtracting Koin or granting a second copy. Test that behavior using PWA games. PWA packaging does not create native platform IAP entitlements.