Keep the classroom simulation under adult control
Use Koin only as a teaching variable, show which states are simulated, and do not gather payment details, credentials, or personal student data. Give instructors a clear way to reset, demonstrate, and discuss fairness, accessibility, and production limitations.
Run a price-comprehension check
Give a new player the offer without explanation and ask them to name the selected item, full Koin amount, available balance, expected balance afterward, quantity or duration, and ownership rule. Let them decline, then repeat with insufficient Koin and a successful choice. Review every place the value appears and remove crossed-out amounts, vague premium labels, unsupported real-currency comparisons, or urgency that distracts from the final cost. The wording on the preview, confirmation, success message, and owned view must describe the same thing. Reopen the game and verify that the balance and ownership shown to the player still match the one transaction they approved.
Keep price and balance together
Place the exact Koin amount beside the current Koin balance and show the expected remaining balance before the player confirms. For educators and student cohorts, the experience must treat Koin as a teaching simulation and keep adult/institutional review in control.
Explain duration and ownership
State whether the item is permanent, consumed on use, limited by quantity, or active for a fixed time. For educators and student cohorts, the experience must treat Koin as a teaching simulation and keep adult/institutional review in control.
Remove misleading price signals
Avoid fake urgency, crossed-out prices, unsupported currency comparisons, and labels that hide the final Koin amount. For educators and student cohorts, the experience must treat Koin as a teaching simulation and keep adult/institutional review in control.