Doodle Jump

CONTROLS: - Desktop: - Left Arrow (keyCode 37): Move character left - Right Arrow (keyCode 39): Move character right - SPACE (keyCode 32): Start game (from menu) or restart (from game over screen) - Hold arrow keys for continuous movement with acceleration - Release arrow keys for deceleration - Mobile/Tablet: - Touch controls not explicitly implemented in code (desktop-focused) BASIC MECHANICS: 1. Movement System: - Character moves left and right with arrow keys - Acceleration when holding direction keys (0.15 per frame) - Deceleration when releasing keys (0.1 per frame) - Maximum speed: 8 units per frame (capped) - Smooth momentum-based movement physics 2. Jumping: - Character automatically jumps when landing on platforms - Normal jump velocity: -8 units (upward) - Jump triggered on platform collision - Jump also triggered when hitting base platform - Jumping is automatic - focus on horizontal steering 3. Gravity: - Gravity constant: 0.2 units per frame - Player falls continuously unless jumping - Gravity affects velocity throughout gameplay - Falling speed increases over time 4. Platform Types - Normal (Type 1): - Standard stable platforms - Width: 70px, Height: 17px - Always appears at score 0-99 - Provides standard jump when landed on - Safe and reliable platform type 5. Platform Types - Moving (Type 2): - Platforms that move horizontally back and forth - Move with velocity of 1 unit per frame - Reverse direction when hitting screen edges - Appears at score 100+ (probability increases with score) - Requires timing to land on moving targets 6. Platform Types - Breakable (Type 3): - Platforms that break when landed on - Player falls through breakable platforms - Visual broken platform animation appears - Broken pieces fall downward - Cannot have two consecutive breakable platforms (prevents impossible gaps) - Appears at score 500+ with increasing frequency 7. Platform Types - Vanishable (Type 4): - Platforms that disappear after being touched - Platform state changes to invisible (hidden) after landing - Provides jump but then vanishes - Cannot be reused if you fall back down - Appears at score 500+ with increasing frequency - Requires quick movement after landing 8. Springs: - Special jump boosters found on platforms - Springs provide super high jump (-16 velocity vs normal -8) - Springs appear on normal and moving platforms only - Springs have two visual states (normal and compressed) - Springs compress visually when activated - Doubles jump height for reaching higher areas 9. Screen Wrapping: - Character wraps around screen edges - Moving left off screen wraps to right side - Moving right off screen wraps to left side - Allows continuous horizontal movement - Prevents getting stuck at screen boundaries 10. Camera and Scrolling: - Camera follows player upward - When player reaches half screen height, platforms scroll upward - Creates illusion of climbing upward - Platforms regenerate when they fall off bottom of screen - Infinite vertical world generation 11. Scoring System: - Score increases by 1 for each frame when climbing upward - Score displayed continuously during gameplay - Higher scores mean more difficult platform combinations - Platform types change based on score thresholds - Score shown in top-left corner 12. Score-Based Difficulty: - Score 0-99: Only normal platforms (Type 1) - Score 100-499: Normal + Moving platforms (Types 1, 2) - Score 500-999: Normal + Moving + Breakable + Vanishable (all types) - Score 1000-1999: More breakable and vanishable platforms - Score 2000-4999: Even more challenging platform combinations - Score 5000+: Maximum difficulty with mostly moving, breakable, and vanishable platforms 13. Platform Generation: - 10 platforms initially spawned - Platforms spaced evenly vertically (height/10 spacing) - New platforms spawn when old ones move off screen - Random platform types based on score-based probability - Random horizontal positions within screen width 14. Collision Detection: - Platform collision checks player position - Collision offset: 15px from player edges (x + 15, width - 15) - Collision only when falling (player.vy > 0) - Collision triggers jump automatically - Different collision handling for each platform type 15. Game Over: - Game over when player falls off bottom of screen - Base platform moves up and player falls below screen - Game over menu displays final score - Can restart with Space key or Restart button - Score shown: "You scored X points!" STRATEGIC TIPS: - Maintain Momentum: Keep arrow keys pressed for smooth acceleration. Don't tap - hold for consistent movement. - Moving Platform Timing: Time your landings on moving platforms. Approach from the side they're moving toward for easier landing. - Breakable Platform Awareness: Watch for breakable platforms. Land on them quickly and immediately jump to next platform before falling through. - Vanishable Platform Strategy: Land on vanishable platforms and move away immediately. They disappear after one use - don't fall back on them. - Spring Utilization: Use springs strategically to reach high clusters of platforms. Springs double your jump height. - Screen Wrapping Advantage: Use screen wrapping to avoid obstacles. If stuck, wrap around to opposite side. - Score Management: Higher scores mean more dangerous platforms. Stay focused as difficulty increases past 500, 1000, 2000+ points. - Horizontal Positioning: Position horizontally before landing. Better positioning means easier platform transitions. - Continuous Movement: Keep moving horizontally even while in air. Air control helps with platform targeting. - Pattern Recognition: Learn common platform patterns. Some combinations appear frequently - recognize safe paths. ADVANCED TECHNIQUES: - Acceleration Mastery: Master the acceleration/deceleration curve. Know exactly when to release keys for precise positioning. - Speed Control: Understand the 8-unit speed cap. Balance between speed (for reaching distant platforms) and control (for precision). - Breakable Chain Technique: When breakable platforms are close, land and immediately jump to chain jumps before falling through. - Moving Platform Prediction: Predict moving platform positions. Land in the middle of their movement range when possible. - Spring Timing: Time spring jumps for maximum height. Use springs to reach difficult-to-access platform clusters. - Wrap-Around Maneuvers: Use screen wrapping strategically. Sometimes wrapping around is faster than moving across screen. - Score Threshold Awareness: Know score thresholds (100, 500, 1000, 2000, 5000). Prepare for difficulty spikes at these points. - Platform Density Reading: Learn to read platform density patterns. Sparse areas require more careful movement. - Fall Recovery: If you fall through a breakable platform, quickly identify next safe platform and steer toward it. - Endurance Building: Build endurance for longer play sessions. Higher scores require sustained focus and quick reactions. WINNING AND PROGRESSION: - Score Goals: Set personal score milestones (100, 500, 1000, 2000, 5000+). Each milestone brings new challenges. - Platform Mastery: Master all platform types. Learn to handle moving, breakable, and vanishable platforms efficiently. - High Score Challenge: Beat your previous high score with each session. Continuous improvement is the goal. - Difficulty Progression: Progress through increasing difficulty levels. Higher scores unlock harder platform combinations. - Spring Mastery: Master spring usage for maximum height gains. Springs are key to reaching very high scores. - Pattern Recognition: Learn to recognize and navigate common platform patterns. Pattern knowledge enables higher scores. - Precision Improvement: Improve movement precision through practice. Precise landings prevent accidental falls. - Speed Optimization: Balance movement speed for optimal gameplay. Too fast causes misses, too slow causes falls. - Endurance Records: Build endurance to maintain focus during long sessions. Extended gameplay enables higher scores. - Mastery Achievement: Master all mechanics including acceleration, platform types, springs, and screen wrapping for maximum scores. Enjoy jumping upward through the endless vertical world of Doodle Jump and see how high you can climb!