Support keyboard and pointer
For a game product manager, this inventory delivery prototype should make every player action and clearly displayed 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. Check tab order, focus indicators, mouse targets, escape behavior, and the return to game controls. Confirmation must never borrow an input that also performs a high-frequency gameplay action.
Plan for wide layouts
Keep the item, Koin amount, balance effect, and actions together on common desktop widths. Avoid pushing cancelling the action off screen simply because the game canvas occupies a large area.
Test window changes
Resize, move between displays, zoom, refresh, and restore a background tab. The interaction should preserve the selected item and resolve pending or delivered states without another grant.
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 desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.
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 desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.
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 desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.