[C#] Runaway Button

Pozdravljeni!
Prosim vas za pomoč pri spodnjem programu:
1. navodila
Make a runaway button that should always be entirely contained in the form and should stay as close to the mouse pointer as possible without giving the possibility to be clicked.
2. moj program

public partial class Form1 : Form
{
    int i = 0;
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        successLabel.Visible = true;
        button1.Enabled = false;
    }

    private void Form1_Click(object sender, EventArgs e)
    {
        if (successLabel.Visible == false) missedLabel.Visible = true;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        successLabel.Visible = missedLabel.Visible = false;
        timer1.Enabled = true;
        progressBar1.Value = progressBar1.Minimum;
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        timer1.Interval = 1000;
        if (progressBar1.Value == progressBar1.Maximum)
        {
            gameOverLabel.Visible = true;
            this.Enabled = false;
            timer1.Enabled = false;
            Form1_MouseClick(sender, e);
        }
        else
        {
            gameOverLabel.Visible = false;
            progressBar1.PerformStep();
        }
    }

    private void Form1_MouseClick(object sender, EventArgs e)
    {
        i++;
        gameOverLabel.Text = "Game over, you failed! " + Environment.NewLine + "Clicks: " + i.ToString();
    }

    private void button1_MouseMove(object sender, MouseEventArgs e)
    {
        missedLabel.Visible = false;
        int x, y;
        Point formClientSize = new Point(ClientSize);

        Random rnd = new Random();
        do
        {
            x = rnd.Next(0, formClientSize.X - button1.Width);
        }
        while (x >= button1.Left - button1.Width && x <= button1.Right);
        do
        {
            y = rnd.Next(0, formClientSize.Y - button1.Height);
        }
        while (y >= button1.Top - button1.Height && y <= button1.Bottom);
        button1.Location = new Point(x, y);
    }
}

Kar naredi moj program je, da generira gumb na naključni poziciji, kar pa ni blizu kazalca miške kot zahteva navodilo. Kaj moram spremenit v MouseMove eventu, da bo pravilno deloval? Vem, da je nekaj v povezavi z e.X in e.Y koordinato...

Prosim & hvala.

Če se ti da bi te prosil, da mi napišeš ta del kode oz. stavek ker ne razumem najbolj...

Ok, hvala.