Что делает это код ? Опишите пожалуйста, кратко [требует правки]

PictureBox pictures;
int Y = 0;
Timer timer1;
int[] P = new int[10];
Random RanInt;
PictureBox PictureRed;
public Form1()
{
    InitializeComponent();
    RanInt = new Random();
    for (int i = 0; i < 10; i++)
    {
        Y += 22;
        pictures = new PictureBox();
        pictures.Parent = this;
        pictures.BackColor = Color.Black;
        pictures.Location = new Point(RanInt.Next(0, Width - 51), Y);
        pictures.Width = 50;
        pictures.Height = 7;
        P[i] = 5;
    }
    PictureRed = new PictureBox();
    PictureRed.Parent = this;
    PictureRed.BackColor = Color.Red;
    PictureRed.Width = 7;
    PictureRed.Height = 7;
    PictureRed.Location = new Point(Width / 2 - PictureRed.Width / 2, 22 * 11);
    timer1 = new Timer();
    timer1.Enabled = true;
    timer1.Interval = 1;
    timer1.Tick += Game;
    timer1.Tick += End;
}
private void Game(object sedner, EventArgs e)
{
    var Pictures = Controls.OfType<PictureBox>().ToList();
    for (int i = 0; i < 10; i++)
        if (Pictures[i].Name != "PictureRed")
        {
            Pictures[i].Left += P[i];
            if (Pictures[i].Left + Pictures[i].Width >= Width) P[i] *= -1; 
            if (Pictures[i].Left <= 0) P[i] *= -1; 
        }
}
bool Up = true;
bool Down = true;
bool LeftBool = true;
bool RightBool = true;
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    switch (e.KeyData)
    {
        case Keys.Up:
            {
                if (Up)
                {
                    timer1.Tick += Up2;
                    Up = false;
                }
                break;
            }
        case Keys.Down:
            {
                if (Down)
                {
                    timer1.Tick += Down2;
                    Down = false;
                }
                break;
            }
        case Keys.Left:
            {
                if (LeftBool)
                {
                    timer1.Tick += Left2;
                    LeftBool = false;
                }
                break;
            }
        case Keys.Right:
            {
                if (RightBool)
                {
                    timer1.Tick += Right2;
                    RightBool = false;
                }
                break;
            }
    }
    if (e.KeyData == Keys.F5)
        if (PictureRed.Top >= 22 * 10)
            PictureRed.Location = new Point(Width / 2 - PictureRed.Width / 2, 22 * 11);
    if (e.KeyData == Keys.Escape) Close();
}
private void Form1_KeyUp(object sender, KeyEventArgs e)
{
    switch (e.KeyData)
    {
        case Keys.Up:
            {
                timer1.Tick -= Up2;
                Up = true;
                break;
            }
        case Keys.Down:
            {
                timer1.Tick -= Down2;
                Down = true;
                break;
            }
        case Keys.Left:
            {
                timer1.Tick -= Left2;
                LeftBool = true;
                break;
            }
        case Keys.Right:
            {
                timer1.Tick -= Right2;
                RightBool = true;
                break;
            }
    }
}
private void Up2(object sender, EventArgs e)
{
    if (PictureRed.Top >= 0) PictureRed.Top -= 1;
}
private void Down2(object sender, EventArgs e)
{
    if (PictureRed.Top + PictureRed.Height <= Height) PictureRed.Top += 1;
}
private void Left2(object sender, EventArgs e)
{
    if (PictureRed.Left >= 0) PictureRed.Left -= 1;
}
private void Right2(object sender, EventArgs e)
{
    if (PictureRed.Left + PictureRed.Width <= Width) PictureRed.Left += 1;
}
bool once = true;
private void End(object sender, EventArgs e)
{
    var Pictures = Controls.OfType<PictureBox>().ToList();
    for (int i = 0; i < Pictures.Count; i++)
        for (int i2 = 0; i2 < Pictures.Count; i2++)
            if (i != i2)
                if ((Pictures[i].Location.X >= Pictures[i2].Location.X - Pictures[i].Width) &
                    (Pictures[i].Location.X <= Pictures[i2].Location.X + Pictures[i2].Width) &
                    (Pictures[i].Location.Y >= Pictures[i2].Location.Y - Pictures[i].Height) &
                    (Pictures[i].Location.Y <= Pictures[i2].Location.Y + Pictures[i2].Height))
                {
                    PictureRed.Location = new Point(Width / 2 - PictureRed.Width / 2, 22 * 11);
                    timer1.Tick -= Up2;
                    timer1.Tick -= Down2;
                    timer1.Tick -= Left2;
                    timer1.Tick -= Right2;
                }
    if (PictureRed.Location.Y <= 0)
        if (once == true)
        {
            once = false;
            timer1.Tick -= Up2;
            timer1.Tick -= Down2;
            timer1.Tick -= Left2;
            timer1.Tick -= Right2;
            PictureRed.Top = 5;
            once = true;
            MessageBox.Show("You Win");
        }
}