Unit of Work Story Map - Nokia Snake Game

Overview

Status: Not Applicable
Reason: User Stories stage was skipped (simple game with clear requirements)
Alternative: Requirements directly map to unit implementation

Story Mapping (Conceptual)

Since user stories were not created, here's how requirements map to the single monolithic unit:

Requirements to Unit Mapping

Requirement Category	Maps to Unit Component	Implementation Priority
FR-01: Platform & Technology	Entire unit	High - Foundation
FR-02: Core Game Mechanics	Game Engine Component	High - Core gameplay
FR-03: Visual Design	Rendering Component	High - User experience
FR-04: Controls	Input Handler Component	High - User interaction
FR-05: Game Modes	Game Engine Component	Medium - Game variety
FR-06: Game State Management	State Management Component	High - Game functionality
FR-07: Game Loop	Game Engine Component	High - Core engine
NFR-01: Performance	All components	Medium - Optimization
NFR-02: Browser Compatibility	Entire unit	High - Accessibility
NFR-03: Responsive Design	Rendering & UI Components	Medium - User experience
NFR-04: Code Quality	Entire unit	Medium - Maintainability
NFR-05: Security	Entire unit	High - Compliance

Development Sequence (Based on Requirements)

Phase 1: Foundation (Week 1-2)

1. Project Setup (FR-01, NFR-04)

   • Vite configuration
   • Directory structure
   • Basic build pipeline

2. Core Game Engine (FR-02, FR-07)

   • Game loop implementation
   • Basic movement and collision
   • Game state foundation

Phase 2: User Experience (Week 3-4)

3. Rendering System (FR-03, NFR-03)

   • WebGL setup and basic rendering
   • Snake and food rendering
   • Grid and visual foundation

4. Input Handling (FR-04)

   • Keyboard input system
   • Control mapping
   • Input validation

Phase 3: Game Features (Week 5-6)

5. State Management (FR-06)

   • Centralized state store
   • State persistence
   • Game state transitions

6. UI System (FR-05)

   • Menu system
   • Game HUD
   • Game screens

Phase 4: Polish & Security (Week 7-8)

7. Services & Plugins (NFR-04)

   • Game orchestration
   • Score service
   • Plugin system

8. Security & Testing (NFR-05)

   • Security implementation
   • End-to-end testing
   • Performance optimization

Alternative: Feature-Based Development

If developing with feature-based approach:

Must Have (MVP)

1. Basic Gameplay: Snake movement, food collection, collision
2. Core Rendering: Basic WebGL rendering, game grid
3. Input System: Keyboard controls
4. Game State: Basic state management

Should Have

5. UI System: Menus, HUD, game screens
6. Score System: Score tracking, high scores
7. State Persistence: Save/load game state

Could Have

8. Power-ups: Special food types, effects
9. Visual Effects: Animations, particle effects
10. Audio System: Sound effects, music

Won't Have (This Version)

11. Multiplayer: Network play
12. Social Features: Leaderboards, sharing
13. Advanced Graphics: 3D effects, complex shaders

Testing Coverage Map

End-to-End Test Scenarios

Test Scenario	Covers Requirements	Priority
Game Startup	FR-01, NFR-02	High
Basic Gameplay	FR-02, FR-04, FR-07	High
Collision Detection	FR-02	High
Score System	FR-06	Medium
State Persistence	FR-06	Medium
UI Navigation	FR-05	Medium
Error Handling	NFR-05	Medium
Performance	NFR-01	Low

Security Implementation Map

SECURITY Baseline Compliance

SECURITY Rule	Implementation Location	Status
SECURITY-04	HTTP Headers	Vite configuration / hosting
SECURITY-05	Input Handler Component	Implemented in input system
SECURITY-12	Authentication	N/A (no auth needed)
SECURITY-15	Exception Handling	Global error handlers

Notes

1. No Formal Stories: Project simplicity didn't warrant formal user stories
2. Direct Requirements Mapping: Requirements directly guide implementation
3. Single Unit Simplification: Monolithic unit simplifies story mapping
4. Development Focus: Focus on technical implementation over user narratives

Next Steps

1. Proceed to Construction Phase: Begin per-unit design and implementation
2. Reference Requirements: Use requirements.md as primary guidance
3. Follow Development Sequence: Implement in logical order
4. Test Against Requirements: Validate implementation against requirements