"Act as an expert Game Developer. Build a 2D top-down mobile football game titled 'FIFA SEKAI SOCCER!'. CORE ENGINE: HTML5 Canvas with 360-degree physics movement. CONTROLS: Left-side dynamic virtual joystick. Right-side 3-button system (A: Pass/Support Run, B: Shoot/Tackle, C: Sprint/Skill). MECHANICS: 3-second 'Contact Tackle' (hold tackle button near ball-carrier to strip ball). Ball 'Magnetism' logic for smooth possession. AI BEHAVIOR: Teammates use 'Home Anchor' logic to maintain tactical formations (5v5 to 11v11) and only break to support when requested. Opponent AI uses Zonal Marking and state-based pressure. PROGRESSION: Starter Collection of 11 players. Training Lab for individual stat-based OVR growth. Fusion Lab for consuming 3 players to provide a guaranteed OVR boost (+1 or +2). TOURNAMENTS: Table-based league stages and knockout brackets for Cups. SOCIAL: Unlocking reward players (Mbappe, Ronaldo, Pele) via social engagement (Like, Share, Comment)."