const GAME_WIDTH = 800; const GAME_HEIGHT = 400; const GRAVITY = 1.8; const JUMP_POWER = -20.0; const HIGH_JUMP_POWER = -28.0; const GROUND_Y = 350; const BASE_SPEED = 15.0; const TARGET_FPS = 20; const MS_PER_TICK = 1000 / TARGET_FPS; const CHUNK_SIZE = 20; const DEBUG_SYNC = true; function lerp(a, b, t) { return a + (b - a) * t; }