Define GDD for King of the Iceberg

Author: DavidQ

docs/gdd/King_of_the_Iceberg_GDD.md

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+# 🧊 King of the Iceberg — Game Design Document (GDD v9)
+
+## Overview
+King of the Iceberg is a chaotic multiplayer arena game where 2–8 pingwins compete to control a floating, unstable iceberg.
+
+## Core Loop
+Win by staying on TOP for X total seconds.
+Timer only increases while on top.
+
+## Key Features
+- Sliding physics + tilt system
+- Jump + stomp impacts affect iceberg
+- Unique hero selection (no duplicates)
+- Power-ups and abilities
+- Wrap-around world (off-screen → opposite side)
+- Iceberg break event at 65%
+- Multiplayer (local + network)
+- Attract mode + leaderboard (fastest win time)
+
+## Heroes (Examples)
+- Splash — water push
+- Frostbite — freeze area
+- Glacier — heavy tilt
+- Dash — burst movement
+- Sniper — precision shot
+- Bombard — explosive impact
+- Cyclone — radial push
+- Anchor — traction boost
+
+## Power-Ups
+- Grip Boots — traction
+- Freeze Orb — freeze players
+- Wave Slam — shockwave
+- Mega Core — extra weight
+- Ice Sniper — projectile boost
+- Spin Core — stronger spin
+- Dash Surge — speed boost
+- Wind Gust — push field
+
+## Systems
+- Tilemap iceberg (left authored, right mirrored)
+- Parallax background
+- Physics-driven combat
+- Network authoritative model
+
+## Next Step
+Proceed to PLAN_PR to build systems and repo structure.