I need a self-contained mystery box mini-game built into a new page of my existing WordPress site (crypto-related). Logged-in visitors will see several closed boxes; they may open one only if they hold enough “Golden Coins.” Coins are not for sale and cannot be earned through actions on the site—I will allocate them manually—so the solution must give me a simple admin interface where I can add or subtract coins from any user account at will. Storing the balance as user meta or in a dedicated table is fine as long as it follows WordPress coding standards. The opening sequence should: • Verify the user is logged in. • Check the coin balance before deducting the cost of a box. • Reveal a random surprise message or reward immediately after the deduction, preferably via AJAX so the page doesn’t reload. No trading, gifting, or additional gamification is required; the only user action is opening a box. Deliverables: 1. Lightweight plugin or clean theme snippet with shortcode/page template that renders the boxes and handles all logic. 2. Backend screen or user-profile fields for manual coin management. 3. Data structure for storing surprise messages/rewards that I can edit from the dashboard. 4. Clear installation and usage notes. I value concise, well-commented code that respects WordPress security practices (nonces, capability checks, prepared SQL). If you have questions about flow or UI, feel free to ask before you start.