Kick Skills World CupAI · Claude 3.5

Core Game Loop and Mechanics

Football Flick is a simple, arcade-style football game focused on one core mechanic: flicking the ball to pass and shoot at goal.

Moment-to-Moment Gameplay

• Player sees a top-down view of a football pitch with their ball, an opponent, and a goal
• Player flicks the ball by touching/clicking it and dragging to aim, then releasing to shoot
• The ball travels in the direction and speed of the flick
• An AI goalkeeper moves to try to block shots
• Player scores by getting the ball past the goalkeeper into the goal
• After each goal or miss, the ball resets to the center
• Game continues for 60 seconds, with the objective to score as many goals as possible

Progression and Engagement

• Score System: Each goal = 1 point
• Time Pressure: 60-second matches create urgency
• High Score: Players try to beat their personal best
• Goalkeeper AI: Goalkeeper reacts to shots, making timing and placement important
• Visual Feedback: Ball trails, goal celebrations, and score updates keep energy high

Win/Lose Conditions

• Win: Score as many goals as possible within 60 seconds
• Game Over: Time runs out, final score is displayed
• Replay: Instant restart to try again

What Makes It Compelling

• One-Touch Simplicity: Easy to learn, satisfying flick mechanic
• Quick Sessions: 60-second matches perfect for mobile
• Skill Expression: Aiming, timing, and power control create depth
• Immediate Feedback: Instant gratification when scoring

Starting Scope

For the first iteration, implement:

MUST HAVE (First Version):

• Single-screen top-down football pitch
• Player-controlled ball with flick mechanics (touch drag for mobile, mouse drag for desktop)
• One stationary goal at the top of the screen
• AI goalkeeper that moves left/right to block shots
• 60-second timer countdown
• Score counter
• Ball physics (movement, friction, boundaries)
• Goal detection and scoring
• Ball reset after goals/misses
• Simple celebration effect when scoring
• Game over screen with final score and restart button

LEAVE FOR LATER:

• Multiple difficulty levels
• Power-ups or special shots
• Obstacles or defenders
• Multiple game modes
• Multiplayer
• Advanced goalkeeper AI patterns
• Ball spin/curve mechanics

Game Perspective

Top-Down View: The game uses a fixed-screen, top-down perspective showing the entire pitch at once. This provides:

• Clear view of ball, goal, and goalkeeper positions
• Easy aiming for flick controls
• Simple spatial understanding
• Classic arcade football feel

The camera is static and shows the full playing field within the 720×1280 viewport.

Game World and Level Design

Playing Field Layout

• Pitch Dimensions: Rectangular field fitting within the 720×1280 viewport
• Player Area: Bottom 60% of screen (768px from bottom) - where the ball starts and player controls from
• Goal Area: Top 20% of screen (256px from top) - contains the goal and goalkeeper
• Transition Zone: Middle 20% - open space for shots to travel

Field Elements

• Goal: Positioned at the top center of the screen

  • Width: ~400px (allowing some challenge but not too difficult)
  • Visual: Goal posts on sides, net behind
  • Goal line clearly marked

• Ball Starting Position: Center of the lower half (360px from left, ~900px from top)

  • Resets here after each goal or miss

• Goalkeeper Starting Position: Center of goal (360px from left, ~200px from top)

  • Moves horizontally along the goal line

• Boundaries:

  • Side walls at x=50 and x=670 (providing 620px play width)
  • Bottom boundary at y=1230 (ball can't go off bottom)
  • Top boundary at y=50 (behind the goal)
  • Ball bounces off side walls with reduced velocity

Visual Design

• Clean, bright grass texture or solid green background
• White pitch markings (center circle, goal box)
• Clear goal structure with posts and net
• Minimalist, readable design that doesn't distract from gameplay

Edit Mode Design

Edit mode allows players to customize the game experience while maintaining balanced gameplay.

Editable Properties

Ball Properties:

• ballColor: Color of the football (default: white with black pattern)
• ballSize: Radius of the ball in pixels (range: 20-40, default: 30)
• maxFlickPower: Maximum speed the ball can be flicked (range: 500-1500, default: 1000)
• friction: How quickly the ball slows down (range: 0.90-0.99, default: 0.96)

Goalkeeper Properties:

• goalkeeperColor: Color of the goalkeeper sprite (default: yellow)
• goalkeeperSpeed: How fast the goalkeeper moves (range: 100-400, default: 250)
• goalkeeperReactionTime: Delay before goalkeeper reacts to shots in ms (range: 100-500, default: 200)

Game Settings:

• matchDuration: Length of match in seconds (range: 30-120, default: 60)
• goalWidth: Width of the goal in pixels (range: 300-500, default: 400)
• pitchColor: Background color of the pitch (default: #2d8a3e)

Visual Settings:

• showTrail: Boolean to show/hide ball trail effect (default: true)
• celebrationDuration: How long goal celebrations last in ms (range: 500-2000, default: 1000)

Constraints

• Ball size must remain visible and controllable
• Goalkeeper speed balanced so goals are achievable but challenging
• Match duration keeps games quick and replayable
• Goal width ensures fair difficulty
• All color values must be valid CSS colors

Edit Mode UI

• Properties organized in collapsible sections (Ball, Goalkeeper, Game, Visual)
• Sliders for numeric ranges with current value display
• Color pickers for color properties
• Toggle switches for boolean properties
• "Reset to Default" button for each section
• Live preview of changes in the game view

Control Design

Football Flick uses a simple flick-based control scheme optimized for touch but also supporting mouse input.

Mobile Controls (Touch)

• Flick to Shoot:

  • Touch the ball and drag in any direction
  • A visual arrow appears showing aim direction and power
  • Release to launch the ball
  • Longer drag = more power (up to max)
  • Direction of drag = direction of shot

• Visual Feedback:

  • Aiming arrow grows as you drag
  • Power indicator shows shot strength
  • Ball highlights when touched

Desktop Controls (Mouse)

• Click and Drag to Shoot:

  • Click on the ball and drag to aim
  • Same visual feedback as touch
  • Release mouse button to shoot

• Alternative: Space bar to restart after game over

Control Implementation Details

• Touch/Click Detection: Only register input when touching/clicking directly on the ball
• Drag Limits: Maximum drag distance caps power (e.g., 150px drag = max power)
• Minimum Power: Very short drags (< 20px) don't register to prevent accidental taps
• Input Lock: Disable input while ball is moving fast (prevents rapid-fire shots)
• Aiming Line: Visual line from ball to drag point, with arrow head showing direction
• Power Bar: Small bar near ball showing power percentage

Control Flow

1. Player touches/clicks ball → Ball highlights, aiming begins
2. Player drags → Aiming arrow updates in real-time
3. Player releases → Ball launches with calculated velocity
4. Ball moves → Input locked until ball slows below threshold
5. Ball stops or scores → Input re-enabled

This control scheme is:

• Intuitive: Natural flicking motion
• Precise: Visual feedback allows accurate aiming
• Satisfying: Direct connection between input and ball movement
• Mobile-First: Designed for touch, works with mouse

Art Style and Visual Theme

Football Flick uses a clean, colorful, cartoon-style aesthetic that's bright, friendly, and easy to read on mobile screens.

Overall Style

• Cartoon/Casual: Simplified, friendly visuals with bold outlines
• Bright and Energetic: Vibrant colors that pop on screen
• Clear Readability: High contrast between elements for easy visibility
• Modern Flat Design: Clean shapes with subtle shadows/highlights

Color Palette

• Pitch: Bright green (#2d8a3e) with lighter green stripes
• Ball: Classic white with black pentagon pattern
• Goalkeeper: Bright yellow/orange jersey for high visibility
• Goal: White posts with light gray net
• UI: White text with dark outlines for readability
• Accents: Blue for score, red for timer when low

Visual Elements

Ball:

• Classic football/soccer ball design
• White base with black pentagon pattern
• Subtle shadow underneath for depth
• Trail effect when moving (white fade)

Goalkeeper:

• Simple humanoid character sprite
• Bright colored jersey (yellow/orange)
• Gloves visible
• Animated idle and dive poses
• Size: ~80px tall, 60px wide

Goal:

• White goal posts (rectangular)
• Light gray net with visible grid pattern
• Posts: 20px thick
• Net depth: 40px behind goal line

Pitch:

• Bright green background
• White line markings (center circle, goal box)
• Subtle grass texture or striped pattern
• Clean boundaries

UI Elements:

• Large, bold numbers for score and timer
• Simple icons (restart button, pause)
• Celebration effects: particle burst, text popup ("GOAL!")

Asset Sizes

• Ball: 60×60px (30px radius)
• Goalkeeper: 80×120px sprite
• Goal posts: 20px wide, 100px tall each
• UI elements: 48×48px minimum for touch targets

Rendering Strategy

• Code-Rendered: Pitch background, goal posts, goal net (simple rectangles/lines), UI text and numbers, aiming arrow
• Generated Assets: Ball sprite, goalkeeper sprite, celebration particle effects
• CSS/Canvas: All geometric shapes, lines, and text

This art style ensures:

• Fast loading and rendering
• Clear visibility on small screens
• Consistent, polished look
• Easy to extend with new visual elements

World Cup edition requirements

This edition must present an international tournament rather than the standard training experience. Include national-team presentation, a World Cup progression structure, escalating knockout matches and a final-stage atmosphere. Team selection, match context and tournament feedback should remain visible throughout play so the page is meaningfully distinct from the base Kick Skills game.