Solution of the "Цвет настроения — красный" Game https://meduza.io/games/tsvet-nastroeniya-krasnyy-igra-meduzy

hack.js

function f() {
    const nodes = document
        .getElementById('/embed/colors-game')
        .contentWindow.document.getElementsByClassName('_3K3dipl65wOMpaMU-KVKf0');
    const nodesByColor = {};
    for (let i = 0; i < nodes.length; i++) {
        const outerHTML = nodes[i].outerHTML;
        const color = outerHTML.split('background-color: ')[1].split(';')[0];
        if (typeof nodesByColor[color] === 'undefined') {
            nodesByColor[color] = [];
        }

        nodesByColor[color].push(i);
    }

    const colors = Object.keys(nodesByColor)
    for (let i = 0; i < colors.length; i++) {
        const currentColor = colors[i];
        if (nodesByColor[currentColor].length === 1) {
            nodes[nodesByColor[currentColor][0]].click();
            break;
        }
    }
}

setInterval(f, 50);