function filterLanguages(scores) {
    let filteredLanguages = Object.keys(scores).filter(language => scores[language] >= 60);
    filteredLanguages.sort((a, b) => scores[b] - scores[a]);
    return filteredLanguages;
}

const scores = {
    "JavaScript": 85,
    "Python": 70,
    "Java": 50,
    "Ruby": 90,
    "C++": 65
};

console.log(filterLanguages(scores)); // ["Ruby", "JavaScript", "Python", "C++"]