Student team plan
Use Koin as a simulated game value for a classroom project. The exercise demonstrates player choice and interface states, not real payment processing.
Student Team guide · Card Battler · Direct Koin item
How a Student Team Can Add a Koin Consumable Boost to a Card Battler Game
Build the card battler game first, then add one optional consumable boost that supports the existing play loop. This guide keeps the item understandable from its first preview through delivery and reload.
Create this game flow
Plan the consumable boost around the game
Why it fits card battler
A card battler browser prototype centered on deck identity, readable rarity, and strategic counterplay.
What the item offers
A consumable boost preview with a concrete description and direct Koin price.
A practical card battler example
Offer moment
Place the consumable boost after this loop advances: a card battler browser prototype centered on deck identity, readable rarity, and strategic counterplay. Wait for a safe pause. Player progress must not depend on the offer.
Offer card
Offer-card rules: Avoid ambiguous rarity promises; State the exact limit. Show the item, benefit, ownership or duration, balance, and clearly stated Koin cost. Keep confirm and cancel separate.
Successful result
Test preview, confirm, insufficient balance, success, decrement quantity only when the player deliberately activates it, and reload. Show that change inside normal play instead of relying only on a success message.
Free path
Test a free session around a card battler browser prototype centered on deck identity, readable rarity, and strategic counterplay. If play becomes incomplete, fix the game before changing the offer.
Design the consumable boost in detail
Use the collection boundary
Show the item in a deck editor, reward summary, or collection screen, never over a timed turn. Players need space to compare ownership, quantity, and deck legality before confirming.
Avoid ambiguous rarity promises
Name the exact card, cosmetic treatment, or content unlock instead of implying a random competitive advantage. If the item is visual only, keep its stats identical and say that plainly.
Validate deck state
After delivery, add the item to the correct collection and enforce copy limits. Cancellation, not enough Koin, and reload should preserve the current deck list without inserting, removing, or upgrading unrelated cards.
Verify collection ownership and deck legality
This card battler game uses a card battler browser prototype centered on deck identity, readable rarity, and strategic counterplay. Review the genre through use the collection boundary and avoid ambiguous rarity promises. For a student team, the consumable boost should support that loop without becoming mandatory. Review the item through state the exact limit and consume only on activation. A student team can split the demonstration between the game loop, interface explanation, and classroom playtesting. The example offer is: A consumable boost preview with a concrete description and direct Koin price. This offer emphasizes a clearly bounded short-term benefit before expanding the catalog. Start with a saved deck list, collection quantities, active format, reward history, and selected cosmetic style. Open the choice from the collection screen after a match, cancel, and confirm the deck remains byte-for-byte equivalent in visible terms. Try insufficient Koin without inserting a placeholder card. Complete a valid named card, visual treatment, or content unlock and apply copy limits and format rules immediately. Play a match, return to the editor, and reopen the game. Check one ownership grant, stable deck contents, unchanged earned rewards, and no random rarity implication. Visual-only items must keep statistics identical, while competitive access remains understandable for a player who declines.
Frame it as a design exercise
Use Koin as simulated game value and explain that the project demonstrates interface states and player choice. Do not collect card details, account credentials, personal information, or money for a classroom prototype.
Divide the demonstration clearly
One teammate can build the game loop, another can own interface wording, and another can run the playtest. Everyone should be able to explain why the item is optional and where it appears after confirmation.
Document what the prototype omits
List native billing, identity, durable storage, security, refunds, age rules, accessibility, and platform review as future production concerns. This shows technical understanding without pretending the browser project solves them.
Present both success and failure
During the demo, cancel once, attempt the item without enough Koin, complete a valid choice, and reopen the game. Explain which results are simulated and what would require real engineering in a released product.
Explain the system during a live demonstration
Prepare a short presentation that begins with the playable core activity, then shows a voluntary item preview, decline, insufficient Koin, valid confirmation, delivery, and reopening. Each teammate should explain one design reason and one technical boundary rather than reading the interface aloud. Include a diagram or note showing which values are simulated and which production systems are absent. Ask classmates to identify any pressure language, inaccessible control, unclear ownership rule, or privacy concern. Finish by describing how identity, durable storage, security, refunds, native policy, and testing would change a real implementation, without collecting personal or payment information during the exercise.
Account for every unit from purchase through use
Write the quantity, effect, duration, activation rule, stack limit, expiration behavior, and moment of consumption before presenting a Koin amount. A successful purchase should add inventory first; it must not activate merely because the player confirmed. Use one unit, interrupt the effect, finish a session, and reopen the game while recording remaining quantity and time. Repeat input during buying and activation to catch double subtraction. Compare ordinary progress, retry access, and failure recovery without the boost, then remove any design that makes the free route intentionally unreasonable. The player should always know how many uses remain, when an effect ends, and whether unused quantity survives another session.
State the exact limit
Show quantity, duration, activation rule, and the point when the consumable is removed. Players should know whether they are buying one use, several uses, or a timed effect.
Consume only on activation
Buying and using are separate actions. Add the item to inventory once buying is complete, then reduce its quantity only when the player deliberately activates it.
Avoid failure pressure
Do not present the boost immediately after every loss or make ordinary progress unreasonable without it. The free retry and recovery path should remain understandable.
Build it in five steps
1. Finish the card battler loop
Make the main activity playable before adding the consumable boost. Players need context to judge whether the item is useful.
Result: A working card battler foundation
2. Write one item definition
A consumable boost preview with a concrete description and direct Koin price. Keep the same wording in the preview, confirmation, and delivered state.
Result: A consistent player promise
3. Generate the purchase choice
Show the exact Koin amount, current Koin balance, confirm, cancel, and what ownership means. Divide the work between the game loop, interface copy, and playtesting. Explain why the item is optional and how the game stays complete without it.
Result: An understandable decision
4. Deliver and recover
Test preview, confirm, insufficient balance, success, decrement quantity only when the player deliberately activates it, and reload. Then test a Koin shortage, a cancelled choice, repeated input, interruption, and reload.
Result: A visible, stable result
5. Test as a student team
Demonstrate confirm, cancel, too little Koin, success, delivery, and reload. Do not collect payment details, account data, or personal information.
Result: Student team plan
Generate it in SEELE
Prompt 1
Create a browser-playable card battler game prototype for a student game team. Build the core loop around deck identity, readable rarity, and strategic counterplay. Add one optional consumable boost offer containing a single-use boost with duration, quantity, Koin price, and activation feedback. Price it directly in Koin, require an explicit confirmation, show the balance effect, and decrement quantity only when the player deliberately activates it. Do not add subscriptions, external payment checkout, revenue reporting, or guaranteed earnings. Include insufficient-Koin, cancel, success, and reload states.
Prompt 2
Keep the item optional. Show its precise Koin price, balance before spending, confirm, cancel, low-balance, success, visible delivery, and reload states.
Student Team playtest checklist
- The consumable boost supports the existing card battler loop.
- The item benefit and ownership rule are clear ahead of confirmation.
- The full price in Koin and current Koin balance appear together.
- A cancelled choice returns to play without loss or pressure.
- Success visibly delivers the confirmed consumable boost.
- Demonstrate confirm, cancel, too little Koin, success, delivery, and reload. Do not collect payment details, account data, or personal information.
Before you publish
- Avoid this design problem: pressure loops that make failure feel like a forced purchase.
- This guide uses a direct Koin transaction for one optional game item. It does not create a subscription or recurring charge.
- The result is a playable browser prototype. Native billing, identity, durable entitlements, security, refunds, and store approval need separate implementation.
- SEELE does not provide payment analytics, tax tools, payout reports, or guaranteed revenue through this flow.
Frequently asked questions
What should this card battler offer contain?
A consumable boost preview with a concrete description and direct Koin price. Start with one item and one price.
Is this a subscription?
No. The player spends Koin directly on one named item or unlock.
What happens if the player cancels?
Return to the same game state without spending Koin or delivering the item.
What if the Koin balance is too low?
Explain the shortage, preserve progress, and do not deliver the item.
Does this include payment or revenue reports?
No. It covers the player-facing purchase experience, not financial reporting.
Is the prototype ready for a native store?
No. The browser prototype still needs native billing, persistence, security, refunds, and platform approval.
Build this card battler purchase flow
Open the complete prompt in SEELE, adjust the item and Koin price, then generate a playable version you can test.
Open this prompt in Workspace