PRD-001: Game Mode with Spaceships

Status

Draft

Metadata

Created: 2025-12-08
Last Updated: 2025-12-08
Owner: Phoenix VC Development Team
Stakeholders: Product Team, UX Design, Development Team
Target Release: Q2 2025

1. Overview

Summary

Implement an interactive game mode that allows users to control a spaceship and navigate through the cosmic starfield visualization, transforming the website experience from passive viewing to active exploration.

Goals

Create an engaging, interactive experience that showcases Phoenix VC's innovation
Increase user engagement time on the website
Differentiate Phoenix VC's digital presence from competitors
Provide an entertaining way to explore the portfolio and cosmic theme

Non-Goals

Full-featured game with scoring or leaderboards
Multi-player functionality
Mobile-first experience (desktop recommended)
Game monetization or in-game purchases

2. Motivation

Business Value

An interactive game mode creates a memorable brand experience that aligns with Phoenix VC's vision of innovation and technology. It serves as a conversation starter with potential partners and demonstrates the firm's commitment to cutting-edge digital experiences.

User Need

Users visiting venture capital websites often have limited engagement options beyond reading content. An interactive game mode provides:

Entertainment value during site exploration
A unique way to discover portfolio companies
Memorable brand interaction that increases recall

Current Pain Points

Static website experiences lack engagement
Portfolio exploration is purely informational
Limited differentiation from competitor websites
No interactive elements to showcase technical capabilities

3. User Stories

Primary User Stories

As a website visitor, I want to toggle game mode on/off, So that I can choose between traditional browsing and interactive exploration
As a user in game mode, I want to control a spaceship using keyboard controls, So that I can navigate through the starfield
As a user flying a spaceship, I want to interact with planets/suns (portfolio companies), So that I can discover information about investments in an engaging way
As a mobile user, I want to be informed that game mode is best experienced on desktop, So that I understand the optimal experience requirements

Edge Cases

User enables game mode during page transitions
User switches tabs while in game mode
Spaceship collision with screen boundaries
Multiple rapid toggles of game mode

4. Functional Requirements

Must Have (P0)

Game mode toggle button in the UI (easily accessible)
Spaceship rendering with distinct visual design
Keyboard controls (arrow keys or WASD) for spaceship movement
Collision detection with portfolio planets/suns
Smooth camera follow for spaceship (viewport tracking)
Disclaimer when enabling game mode (experimental feature notice)
Ability to exit game mode at any time
Spaceship physics (momentum, acceleration, deceleration)

Should Have (P1)

Spaceship rotation animation based on movement direction
Particle effects for spaceship thrust/engine
Sound effects toggle (optional audio for engine, collisions)
Visual indicator showing game mode is active
Minimap showing spaceship position in the cosmos
Tutorial/help overlay on first game mode activation

Nice to Have (P2)

Multiple spaceship designs to choose from
Warp speed boost mechanic (hold shift key)
Achievement tracking (planets visited, distance traveled)
Gamepad/controller support
Screen shake effects on collisions
Trail effect behind spaceship

5. Non-Functional Requirements

Performance

Maintain 60 FPS during spaceship movement and interactions
Game mode activation should complete within 500ms
Spaceship control response time < 16ms (1 frame at 60fps)
Canvas rendering optimization to handle spaceship layer

Security

No external game assets loaded from untrusted sources
Local storage limits for user preferences
Input sanitization for keyboard controls

Accessibility

Game mode is optional, not required for site navigation
Alternative text for game mode toggle button
Keyboard shortcuts announced to screen readers
High contrast option for spaceship visibility

Browser Support

Modern browsers: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
WebGL support required
Fallback message for unsupported browsers
Desktop experience recommended (>1024px viewport)

6. Technical Considerations

Architecture

The game mode will be implemented as a layer on top of the existing starfield canvas system, using the consolidated RAF loop from ADR-001.

┌─────────────────────────────────────────────┐
│         Single RAF Loop (ADR-001)           │
│  ┌──────────┐  ┌──────────┐  ┌──────────┐  │
│  │  Camera  │→ │  Physics │→ │ Renderer │  │
│  │  Update  │  │  Update  │  │   Pass   │  │
│  │          │  │          │  │          │  │
│  │          │  │ + Ship   │  │ + Ship   │  │
│  │          │  │   Physics│  │   Layer  │  │
│  └──────────┘  └──────────┘  └──────────┘  │
└─────────────────────────────────────────────┘

Key Components

SpaceshipController: Handles input and spaceship state management
SpaceshipPhysics: Implements movement, acceleration, and collision physics
SpaceshipRenderer: Renders spaceship sprite/model on canvas
GameModeToggle: UI component for enabling/disabling game mode
GameModeContext: React context for game mode state management

Technology Stack

React for UI components
TypeScript for type safety
Canvas API for rendering
Existing animation framework (framer-motion for UI elements)
No additional game engines required

Integration Points

Existing starfield canvas system
Consolidated RAF loop (ADR-001)
Spatial partitioning quadtree (ADR-002) for collision detection
Theme system for spaceship styling
Portfolio data for planet/sun interactions

7. Dependencies

Internal Dependencies

ADR-001: Consolidated RAF loop must be implemented
ADR-002: Quadtree spatial partitioning (for efficient collision detection)
Current starfield rendering system
Camera system for viewport tracking
Theme system for visual consistency

External Dependencies

None (self-contained feature)

Prerequisites

Performance optimization of base starfield (maintain 60fps with game layer)
Spaceship asset creation (SVG or sprite)
Input handling architecture review

8. Success Metrics

Key Performance Indicators (KPIs)

Metric	Current	Target	Measurement Method
Avg. session duration	~2 min	+50% (3 min)	Analytics tracking
Game mode activation rate	N/A	25% of visitors	Event tracking
User engagement (return visits)	Baseline	+20%	User analytics
Frame rate during gameplay	N/A	>55 FPS	Performance monitoring
Bounce rate	Baseline	-15%	Analytics tracking

User Acceptance Criteria

Users can toggle game mode on/off without page reload
Spaceship controls are responsive and intuitive
No performance degradation compared to base starfield
Collision detection works accurately
Feature works on major desktop browsers
Tutorial is clear and helpful for first-time users

9. Timeline

Phase 1: Core Mechanics (4 weeks)

Duration: 4 weeks

Implement spaceship entity and rendering
Add keyboard input handling
Create basic physics (movement, acceleration)
Add game mode toggle UI
Implement camera follow system

Phase 2: Polish & Interactions (3 weeks)

Duration: 3 weeks

Add collision detection with planets/suns
Implement particle effects for thrust
Create tutorial/help overlay
Add sound effects (optional toggle)
Implement disclaimer modal

Phase 3: Testing & Optimization (2 weeks)

Duration: 2 weeks

Performance testing and optimization
Cross-browser testing
User testing and feedback incorporation
Bug fixes and edge case handling
Documentation and launch preparation

10. Open Questions

Technical Questions

Q: Should spaceship use sprite-based or procedural rendering?
- Status: Open
- Notes: Sprite is simpler, procedural allows dynamic theming
Q: What physics model should be used (arcade vs realistic)?
- Status: Open
- Notes: Arcade is more fun, realistic is more impressive
Q: Should game mode state persist across sessions?
- Status: Under Discussion
- Notes: Could be annoying if user forgets it's enabled

Product Questions

Q: Should game mode be discoverable or require user to find it?
- Status: Open
- Notes: Balance between surprise and discoverability
Q: What happens when spaceship reaches a portfolio company?
- Status: Under Discussion
- Notes: Options: popup, redirect, special animation

11. Risks & Mitigation

Risk	Impact	Probability	Mitigation Strategy
Performance degradation	High	Medium	Extensive performance testing, frame rate monitoring, graceful degradation
User confusion about purpose	Medium	Medium	Clear tutorial, intuitive controls, obvious toggle
Mobile experience issues	Medium	High	Show disclaimer, recommend desktop, potentially disable on mobile
Distraction from main content	Medium	Low	Easy exit, subtle integration, time limits or auto-disable
Browser compatibility issues	High	Low	Progressive enhancement, feature detection, fallback messaging

12. Alternatives Considered

Alternative 1: Mouse-based Flight Controls

Description: Use mouse position for spaceship direction instead of keyboard Pros: More intuitive for some users, touch-friendly Cons: Less precise control, conflicts with existing hover interactions Decision: Rejected - keyboard provides better control precision

Alternative 2: Auto-pilot Tour Mode

Description: Spaceship flies automatically through portfolio Pros: No user input required, works on all devices Cons: Less engaging, no interactivity Decision: Could be Phase 4 addition as "guided tour"

Alternative 3: Full 3D Flight Simulator

Description: Use Three.js for 3D spaceship navigation Pros: More impressive visually, depth perception Cons: Significantly more complex, performance concerns, steeper learning curve Decision: Rejected - 2D is sufficient and more performant

13. References

Revision History

Date	Version	Author	Changes
2025-12-08	0.1	AI Agent	Initial draft based on feature requirements

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