Feature: HTML5 Canvas game foundation and basic structure

[cyrusagent]

Summary

Implemented the complete HTML5 Canvas game foundation and basic structure for the Flappy Bird clone as specified in TEST-120.

What's Included

• ✅ Complete HTML5 Structure: Semantic HTML with proper canvas setup (480x640 dimensions)
• ✅ Modern CSS Styling: Responsive design with gradient backgrounds, glass-morphism effects, and mobile optimization
• ✅ Game Loop Foundation: RequestAnimationFrame-based loop achieving stable 60 FPS performance
• ✅ State Management: Complete game state system (READY, PLAYING, GAMEOVER) with proper transitions
• ✅ Canvas Utilities: Drawing helpers, screen clearing, text rendering with stroke effects
• ✅ Interactive Controls: Space key and mouse click handling for state transitions
• ✅ Performance Monitoring: Built-in FPS counter showing real-time performance metrics
• ✅ Visual Polish: Animated background with moving clouds for enhanced user experience

Technical Implementation

• HTML: Clean semantic structure with canvas element and game info display
• CSS: Responsive design with media queries, modern visual effects, and mobile optimization
• JavaScript: ES6 class-based architecture with modular methods for easy extension

Performance

• Confirmed 60 FPS rendering with smooth animations
• Efficient canvas clearing and redrawing cycles
• Optimized event handling and state management

Testing

• Manual browser testing confirms all functionality works correctly
• No JavaScript errors or performance issues detected
• Responsive design tested across different screen sizes

This foundation is now ready for implementing specific game mechanics like bird physics, pipe generation, and collision detection in subsequent features.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com