juego de pictureBox imagen en C#

Elementos que vamos a necesitar; 

Código del programa;

int Score=0;

pictureBox1.Visible=false;

             private void timer1_Tick(object sender, System.EventArgs e)

             {

                    Random R=new Random();

                    int x=R.Next(0,this.Width);

                    int y=R.Next(0,this.Height-panel1.Height);

                    pictureBox1.Location=new Point(x,y);

                   

                   

             }

             private void button1_Click(object sender, System.EventArgs e)

             {

                    Score=0;

                    label1.Text="Score : "+Score.ToString();

                    pictureBox1.Visible=true;

                    timer2.Enabled=true;

                    timer1.Enabled=true;

                   

             }

             private void button2_Click(object sender, System.EventArgs e)

             {

                    timer1.Enabled=false;

                    timer2.Enabled=false;

                    pictureBox1.Visible=false;

             }

             private void pictureBox1_Click(object sender, System.EventArgs e)

             {

                    Score=Score+10;

                    label1.Text="Score : "+Score.ToString();

             }

             private void button3_Click(object sender, System.EventArgs e)

             {

                    Application.Exit();

             }

             private void timer2_Tick(object sender, System.EventArgs e)

             {

                    timer1.Enabled=false;

                    if(Score>50)

                    {

                           MessageBox.Show(Score.ToString(),"OK \n It is Good");

                    }

                    else

                    {

                           MessageBox.Show(Score.ToString(),"It is Very Bad");

                    }

                    MessageBox.Show(Score.ToString());

             }