6.1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace spaceinvaiders
{
    public partial class Form1 : Form
    {
        bool goleft;
        bool goright;
        int speed = 5;
        int score = 0;
        bool isPressed;
        int totalEnemies = 14;
        int playerSpeed = 6;

        public Form1()
        {
            InitializeComponent();
        }

        private void keyisdown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Left)
            {
                goleft = true;
            }
            if (e.KeyCode == Keys.Right)
            {
                goright = true;
            }
            if (e.KeyCode == Keys.Space && !isPressed)
            {
                isPressed = true;
                Shot();
            }
        }

        private void keyisup(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Left)
            {
                goleft = false;
            }
            if (e.KeyCode == Keys.Right)
            {
                goright = false;
            }
            if (isPressed)
            {
                isPressed = false;

            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (goleft)
            {
                player.Left -= playerSpeed;

            }
            else if (goright)
            {
                player.Left += playerSpeed;

            }

            foreach(Control x in this.Controls)
            {
                if(x is PictureBox && x.Tag == "invaders")
                {
                    if (((PictureBox)x).Bounds.IntersectsWith(player.Bounds))
                        {
                        gameOver();
                        }
                    ((PictureBox)x).Left += speed;

                    if(((PictureBox)x).Left>720)
                    {
                        ((PictureBox)x).Top += ((PictureBox)x).Height + 10;

                        ((PictureBox)x).Left = -50;
                    }
                }
            }

            foreach(Control y in this.Controls)
            {
                if(y is PictureBox && y.Tag == "laser")
                {
                    y.Top -= 20;
                    if(((PictureBox)y).Top < this.Height - 490)
                    {
                        this.Controls.Remove(y);
                    }
                }
            }


            foreach (Control i in this.Controls)
            {
               foreach(Control j in this.Controls)
                {
                    if(i is PictureBox && i.Tag == "invaders")
                    {
                        if (j is PictureBox && j.Tag == "laser")
                        {

                            if(i.Bounds.IntersectsWith(j.Bounds))
                            {
                                score++;
                                this.Controls.Remove(i);
                                this.Controls.Remove(j);
                            }
                        }
                    }
                }
            }



        }



        private void Shot()
        {
            PictureBox laser = new PictureBox();
            laser.Image = Properties.Resources.laser;
            laser.Size = new Size(5, 20);
            laser.Tag = "laser";
            laser.Left = player.Left + player.Width / 2;
            laser.Top = player.Top - 20;
            this.Controls.Add(laser);
            laser.BringToFront();

            label1.Text = "Score :" + score;

            if(score > totalEnemies -1)
            {
                gameOver();
                MessageBox.Show("You win!");
            }
        }

        private void gameOver()
        {
            timer1.Stop();
            label1.Text += " Game Over";
        }
    }
}