Gravity Flux Flappy-Style Game

I want you to act as a top-tier physics-based gameplay programmer. Produce a SINGLE FILE (index.html) build of an architectural flight evasion game.

GAME SPEC:

Title: Gravity Flux

Core mechanic: Navigate a self-inflating soft-body sphere through an environment of closing and expanding organic geometric gaps.

Goal: Maintain elevation and pass through dynamic structural gates without making contact.

TECH REQUIREMENTS:

Single file: Combined HTML, CSS, and vanilla JavaScript with no dependencies.

Rendering: 2D Canvas API. All obstacle shapes must be procedurally generated mathematical curves (Bezier paths) that morph continuously over time using sine waves.

Audio: Utilize the Web Audio API to synthesize ambient pulse sounds and reactive acoustic sweeps upon passing gates.

Design style: Zen-like abstract art style. Uses a monochromatic pastel palette with deep soft shadows (shadowBlur on canvas) to emphasize spatial depth and fluid motion.

我要你充当一名顶级的基于物理机制的游戏玩法程序员。请构建一个单文件（index.html）的建筑飞行规避游戏。

游戏规格：

标题：Gravity Flux

核心机制：操控一个自动充气的软体球形角色，穿越由不断开合与伸缩的有机几何缝隙组成的环境。

目标：保持高度，穿过动态变化的结构门洞，且不发生碰撞。

技术要求：

单文件：整合 HTML、CSS 和原生 JavaScript，无任何依赖项。

渲染：使用 2D Canvas API。所有障碍物形状必须是通过正弦波持续变形的程序化生成数学曲线（贝塞尔路径）。

音频：利用 Web Audio API 合成环境脉冲音效，并在玩家通过门洞时触发反应式声波扫频效果。

设计风格：禅意抽象艺术风格。采用单色系粉彩配色方案，结合深度柔化阴影（canvas 的 shadowBlur）来强调空间纵深感与流畅运动感。