Trocando de cor .........ficou delay mais foi kkkkkkkkkkkk | JavaScript e HTML: pratique lógica com desenhos, animações e um jogo

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Programa 3</title>
</head>
<body>
    <canvas width="600" height="400"></canvas>
    <script>
        var canvas = document.querySelector('canvas')
        var context = canvas.getContext('2d')
        var cores = ['blue','red','green']
        var cor = 0

        context.fillStyle = 'grey'
        context.fillRect(0,0,600,400)


        function desenharBolinha(evento){
            var x = evento.pageX - canvas.offsetLeft;
            var y = evento.pageY - canvas.offsetTop;

            context.beginPath()
            context.arc(x,y, 10, 0, 2*3.14)
            context.fill()
        }

        function mudarCor(){ 
            if(cor < 3){
                context.fillStyle = cores[cor]
                cor++
            }else{
                cor = 0
            }
        }

        canvas.addEventListener('click', desenharBolinha)
        canvas.addEventListener("contextmenu", mudarCor)
    </script>
</body>
</html>

após vê a solução

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Programa 3</title>
</head>
<body>
    <canvas width="600" height="400"></canvas>
    <script>
        var canvas = document.querySelector('canvas')
        var context = canvas.getContext('2d')
        var cores = ['blue','red','green']
        var cor = 0

        context.fillStyle = 'grey'
        context.fillRect(0,0,600,400)


        function desenharBolinha(evento){
            var x = evento.pageX - canvas.offsetLeft;
            var y = evento.pageY - canvas.offsetTop;

            context.fillStyle = cores[cor]
            context.beginPath()
            context.arc(x,y, 10, 0, 2*3.14)
            context.fill()
        }

        function mudarCor(){ 
            cor++
            if(cor >= cores.length){
                cor = 0
            }

            return false;
        }

        canvas.addEventListener('click', desenharBolinha)
        canvas.addEventListener("contextmenu", mudarCor)
    </script>
</body>
</html>