Minefun Galaxy Sky Toggle

Galaxy sky overlay for Minefun (all modes)
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// ==UserScript==
// @name         Minefun Galaxy Sky Toggle
// @namespace    https://greasyfork.org
// @version      1.0
// @description  Galaxy sky overlay for Minefun (all modes)
// @match        *://*minefun*/*
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    // ===== CREATE SKY OVERLAY =====
    const sky = document.createElement("div");
    sky.id = "galaxySky";
    document.body.appendChild(sky);

    Object.assign(sky.style, {
        position: "fixed",
        top: "0",
        left: "0",
        width: "100vw",
        height: "100vh",
        zIndex: "9999",
        pointerEvents: "none",
        background: "radial-gradient(circle at 20% 20%, #ff00ff, transparent 40%)," +
                    "radial-gradient(circle at 80% 30%, #00ffff, transparent 40%)," +
                    "radial-gradient(circle at 40% 70%, #ffcc00, transparent 40%)," +
                    "radial-gradient(circle at 70% 80%, #ff0033, transparent 40%)," +
                    "black",
        mixBlendMode: "screen",
        opacity: "0",
        transition: "opacity 0.5s ease",
        animation: "galaxyMove 6s infinite alternate"
    });

    // ===== ANIMATION =====
    const style = document.createElement("style");
    style.innerHTML = `
    @keyframes galaxyMove {
        0% { filter: hue-rotate(0deg) brightness(1); transform: scale(1); }
        50% { filter: hue-rotate(180deg) brightness(1.3); transform: scale(1.05); }
        100% { filter: hue-rotate(360deg) brightness(1); transform: scale(1); }
    }

    #galaxyBtn {
        position: fixed;
        top: 100px;
        right: 20px;
        z-index: 10000;
        padding: 10px 14px;
        background: #111;
        color: white;
        border: 1px solid #555;
        cursor: pointer;
        font-family: sans-serif;
        user-select: none;
    }
    `;
    document.head.appendChild(style);

    // ===== TOGGLE BUTTON =====
    const btn = document.createElement("div");
    btn.id = "galaxyBtn";
    btn.innerText = "Galaxy OFF";
    document.body.appendChild(btn);

    let enabled = false;

    btn.onclick = () => {
        enabled = !enabled;
        sky.style.opacity = enabled ? "1" : "0";
        btn.innerText = enabled ? "Galaxy ON" : "Galaxy OFF";
    };

    // ===== DRAG BUTTON =====
    let isDrag = false, offsetX, offsetY;

    btn.addEventListener("mousedown", (e) => {
        isDrag = true;
        offsetX = e.clientX - btn.getBoundingClientRect().left;
        offsetY = e.clientY - btn.getBoundingClientRect().top;
    });

    document.addEventListener("mousemove", (e) => {
        if (!isDrag) return;
        btn.style.left = (e.clientX - offsetX) + "px";
        btn.style.top = (e.clientY - offsetY) + "px";
        btn.style.right = "auto";
    });

    document.addEventListener("mouseup", () => {
        isDrag = false;
    });

})();