Support keyboard and pointer
For a game product manager, this purchase confirmation prototype should make every player action and player-visible outcome easy to evaluate. Write how to show the exact item, Koin amount, balance impact, and explicit confirm/cancel actions. 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.
Repeat the complete choice
The confirmation should repeat the selected item, exact Koin amount, visible Koin balance, remaining balance, and ownership rule without introducing a different offer. Test that behavior using desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.
Separate confirm from cancel
Use distinct actions with clear labels and enough spacing for the target input method. Returning to the game should never spend Koin. Test that behavior using desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.
Prevent repeated confirmation
After confirmation, show a pending state and disable repeated input until the result is known. A slow response should not create duplicate grants. Test that behavior using desktop web games. Desktop browser purchases remain Koin flows inside the supported experience.