C#编写一个大字母游戏，详细代码，不懂问博主。。。。

 using System;
 using System.Drawing;
 using System.Windows.Forms;
 using System.Media;

 namespace dazimuyouxi_2
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }
         int i = , j = ;

         private void Form1_Load(object sender, EventArgs e)
         {
             label1.BackColor = Color.Green;
             label2.BackColor = Color.Red;
             label1.Text = "分数：" + i;
             label2.Text = "错误：" + j;
             this.KeyPress += Form1_KeyPress;
             this.comboBox1.SelectedIndex = ;
         }
         bool istrue = true;
         SoundPlayer s = new SoundPlayer("GRAY2WEA.WAV");
         private void Form1_KeyPress(object sender, KeyPressEventArgs e)
         {

             foreach (Control item in Panel1.Controls)
             {
                 if (item.Text == e.KeyChar.ToString().ToUpper())
                 {
                     if (istrue == true)
                     {
                         item.Tag = "bj";
                         feiji.Location = new Point(new Size(item.Left + item.Width /  - feiji.Width / , feiji.Top));
                         Label zd = new Label();
                         zd.Size = new Size(, );
                         zd.Location = new Point(new Size(feiji.Left + feiji.Width /  - zd.Width /  + , feiji.Top));
                         zd.Text = item.Text;
                         zd.Tag = "zidan";
                         zd.Image = imageList2.Images[];
                         zd.AutoSize = true;
                         Panel1.Controls.Add(zd);
                         istrue = false;
                     }
                 }
             }
         }
         Random a = new Random();
         private void timer1_Tick(object sender, EventArgs e)
         {
             Label lab = new Label();
             lab.BackColor = Color.Transparent;
             lab.Size = new Size(, );
             lab.Text = Convert.ToChar(a.Next(, )).ToString();
             lab.ForeColor = Color.FromArgb(a.Next(), a.Next(), a.Next());
             lab.Font = new Font("微软雅黑", );
             lab.Location = new Point(new Size(a.Next(, Panel1.Width - lab.Width - ), ));
             lab.AutoSize = true;
             lab.Tag = "zimu";
             this.Panel1.Controls.Add(lab);
         }
         private void timer2_Tick(object sender, EventArgs e)
         {
             foreach (Control item in Panel1.Controls)
             {
                 if (item.GetType().Name == "Label")
                 {
                     if (item.Tag.ToString() == "zimu" || item.Tag.ToString() == "bj")
                     {
                         item.Top += ;
                         if (item.Bottom >= feiji.Top)
                         {
                             item.Dispose();
                             j += ;
                             label2.Text = "错误：" + j;
                         }
                     }
                     if (item.Tag.ToString() == "zidan")
                     {
                         item.Top -= ;
                         foreach (Control xz in Panel1.Controls)
                         {
                             if (xz.GetType().Name == "Label")
                             {
                                 if (xz.Tag.ToString() == "bj")
                                 {
                                     if (xz.Bottom >= item.Top)
                                     {
                                         PictureBox pb = new PictureBox();
                                         pb.Image = imageList1.Images[];
                                         pb.BackColor = Color.Transparent;
                                         pb.Location = item.Location;
                                         pb.Tag = ;
                                         pb.Size = new Size(, );
                                         pb.SizeMode = PictureBoxSizeMode.StretchImage;
                                         //pb.BackColor = Color.Red;
                                         Panel1.Controls.Add(pb);
                                         timer3.Start();
                                         s.Play();
                                         item.Tag = ;
                                         xz.Dispose();
                                         item.Dispose();
                                         i += ;
                                         label1.Text = "分数：" + i;
                                         istrue = true;
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }

         private void timer3_Tick(object sender, EventArgs e)
         {
             foreach (Control item in Panel1.Controls)
             {
                 if (item.GetType().Name == "PictureBox" && item.Tag != null)
                 {
                     int n = int.Parse(item.Tag.ToString());
                     n++;
                     if (n > )
                     {
                         item.Dispose();
                         return;
                     }
                     ((PictureBox)item).Image = imageList1.Images[n];
                     ((PictureBox)item).Tag = n;
                 }
             }
         }

         private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
         {
             comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
             if (comboBox1.Text == "长平之战")
             {
                 this.BackgroundImage = new Bitmap("2.jpg");
             }
             if (comboBox1.Text == "赤壁之战")
             {
                 this.BackgroundImage = new Bitmap("3.jpg");
             }
             if (comboBox1.Text == "蓝色星球")
             {
                 this.BackgroundImage = Image.FromFile("1.jpg");
             }
         }

         private void button1_Click(object sender, EventArgs e)
         {
             if (button1.Text == "开始")
             {
                 timer1.Start();
                 timer2.Start();
                 button1.Text = "暂停";
             }
             else
             {
                 button1.Text = "开始";
                 timer1.Stop();
                 timer2.Stop();
             }
         }

         private void timer4_Tick(object sender, EventArgs e)
         {

             foreach (Control item in Panel1.Controls)
             {
                 if (item.GetType().Name == "Label" && item.Tag.ToString() == "zidan")
                 {
                     item.BackColor = Color.Transparent;
                     int m = int.Parse(((Label)item).Image.Tag.ToString());
                     m++;
                     if (m > )
                     {
                         item.Dispose();
                         return;
                     }
                     ((Label)item).Image = imageList2.Images[m];
                     ((Label)item).Image.Tag = m;
                 }
             }
         }
     }
 }