mihaid11/emberguard

Implement crystal entry fee in `StartTowerDefenseMenu`

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#102 opened on Jun 19, 2026

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enhancementgood first issue

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Description

Currently, entering a Tower Defense level does not consume any upfront crystals from the player's permanent balance. To implement the "Expedition/Entry Fee" mechanic, the game should deduct a fixed amount of Crystals when the player clicks the "Start" button for a level.

In StartTowerDefenseMenu, we need to check if the player has enough global crystals to cover the entry fee before allowing them to start the level. If they do, deduct the fee from their balance and proceed; otherwise, block the entry and show a fading error message. For now, bind it to the level number (level * 20).

Priority: Low

Contributor guide

Research direction
Examine the StartTowerDefenseMenu class to understand how it currently handles starting a level. Add a check for the player's crystal balance before starting. Deduct the fee (level * 20) from the balance and display an error message if insufficient.
Tech stack
ccpp
Domain
game devbackend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++SFML
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60