Asteroids game balance model. Pools: LargeAsteroids(3/4/5), MediumAsteroids(0), SmallAsteroids(0), Score(0), Lives(3), Level(1), AsteroidsRemaining Flow: LargeAsteroids hit(5 hits) → MediumAsteroids(2 spawn) → SmallAsteroids(3 spawn) → destroyed Scoring: Large=20pts, Medium=50pts, Small=100pts Extra life every 10000 points Level progression: when AsteroidsRemaining=0, Level+1, spawn more asteroids Difficulty: Easy(3 asteroids, speed 0-3), Medium(4 asteroids, speed 0-5), Hard(5 asteroids, speed 0-7) Hit chance proportional to size, inversely proportional to speed
