Source code.

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
namespace TileMap
{
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        #region Variables
        #region Texture2D
        Texture2D playerRight;
        Texture2D playerLeft;
        Texture2D player;
        Texture2D zombie;
        Texture2D bullet;
        Texture2D turrentBullet;
        Texture2D turrent;
        #endregion Texture2D
        #region Rectangles
        Rectangle shopButton1;
        Rectangle shopButton2;
        Rectangle shopButton3;
        Rectangle shopButton4;
        Rectangle shopButton5;
        Rectangle shopButton6;
        Rectangle turrentLoc;
        #endregion Rectangles
        #region Booleans
        bool shopButtonLock = false;
        bool mouseButtonLock = false;
        bool gameOver = false;
        bool shoot = true;
        bool mapDraw = true;
        bool shopOpen = false;
        bool gotTurrent=false;
        #endregion Booleans
        #region SpriteFonts
        SpriteFont font;
        SpriteFont mFont;
        SpriteFont lFont;
        #endregion SpriteFonts
        #region strings
        string t1 = "Null";
        #endregion
        #region floats
        float playerLocBufferY = 0;
        float elapsed;
        float timer1=3;
        float timer2 = 2;
        float timer3 = 1;
        float zSpawnTime = 8;
        float waveZSpawn = 8;
        #endregion
        #region ints
        int zombiesSpawned = 0;
        int wave = 20;
        int money = 20;
        int playerHP;
        int playerMaxHP;
        int playerView = 1;
        int playerDamage = 25;
        int turrentDamage = 15;
        #endregion
        #region Vector2
        Vector2 playerLoc;
        Vector2 screenSize;
        Vector2 screenSizeRounded;
        #endregion

        #region Lists
        List<Texture2D> textureMap=new List<Texture2D>();
        List<Rectangle> collisonBoxes = new List<Rectangle>();
        List<Rectangle> bullets = new List<Rectangle>();
        List<Rectangle> zombieLoc = new List<Rectangle>();
        List<Rectangle> turrentBullets = new List<Rectangle>();
        List<int> zombieHP = new List<int>();
        #endregion
        #region map
        int[,] map=new int[,]{
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
            {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
        };
        #endregion map
        #endregion
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.IsFullScreen = false;
            graphics.PreferredBackBufferHeight = 480;
            graphics.PreferredBackBufferWidth = 1568;
            Content.RootDirectory = "Content";
        }
        protected override void Initialize()
        {
            this.IsMouseVisible = true;
            screenSize = new Vector2(GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height);
            screenSizeRounded = new Vector2((int)Math.Round(screenSize.X), (int)Math.Round(screenSize.Y));
            shopButton1 = new Rectangle(0, 0, 14*3, 20);
            shopButton3 = new Rectangle((int)screenSizeRounded.X / 2 - 500, (int)screenSizeRounded.Y / 2 - 180, 14 * (18/4*3), 20);
            shopButton2 = new Rectangle((int)screenSizeRounded.X/2-500, (int)screenSizeRounded.Y/2-150, 14*(15/4*3), 20);
            shopButton4 = new Rectangle((int)screenSizeRounded.X / 2 - 500, (int)screenSizeRounded.Y / 2 - 120, 14 * (12/4*3), 20);
            playerMaxHP = 100;
            playerHP = playerMaxHP;

            base.Initialize();
        }
        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);

            textureMap.Add(Content.Load<Texture2D>("tile1"));
            textureMap.Add(Content.Load<Texture2D>("tile2"));
            player = Content.Load<Texture2D>("player");
            playerRight = Content.Load<Texture2D>("playerRight");
            playerLeft = Content.Load<Texture2D>("playerLeft");
            zombie = Content.Load<Texture2D>("enemy");
            bullet = Content.Load<Texture2D>("playerBullet");
            turrent = Content.Load<Texture2D>("turrent");
            turrentBullet = Content.Load<Texture2D>("turrentBullet");

            font = Content.Load<SpriteFont>("RegularFont");
            mFont = Content.Load<SpriteFont>("MediumFont");
            lFont = Content.Load<SpriteFont>("LargeFont");
            playerLoc = new Vector2(20, screenSize.Y - player.Height-32);
            turrentLoc = new Rectangle(200, (int)screenSizeRounded.Y-32 - turrent.Height, turrent.Width, turrent.Height);

        }
        protected override void UnloadContent()
        {

        }
        public void spawnZombie()
        {
            zombieLoc.Add(new Rectangle((int)Math.Round(screenSize.X) - zombie.Width, (int)Math.Round(screenSize.Y) - zombie.Height-32, zombie.Width, zombie.Height));
            zombieHP.Add(100);
            if (zSpawnTime < 28 && wave==2)
            {
                zSpawnTime = 8;
            }
            else if (zSpawnTime > 2 || wave > 15)
            {
                if(zSpawnTime>0.4)
                    zSpawnTime -= 0.02f;
            }
            t1 = zSpawnTime.ToString() ;
            zombiesSpawned++;
        }
        public void killZombie(int z)
        {
            zombieLoc.Remove(zombieLoc[z]);
            zombieHP.Remove(zombieHP[z]);
            money += wave * 2;
        }
        public void shootTurrent()
        {
            turrentBullets.Add(new Rectangle(turrentLoc.X + turrent.Width / 2, turrentLoc.Y + turrent.Height / 2-6, turrentBullet.Width, turrentBullet.Height));
        }
        protected override void Update(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();
            #region KeyChecker
            #region Alts
            if (Keyboard.GetState().IsKeyDown(Keys.LeftAlt))
            {
                if (Keyboard.GetState().IsKeyDown(Keys.L))
                {
                    mapDraw = false;
                }
                else
                {
                    mapDraw = true;
                }
            }
            #endregion Alts
            #region Ctrls
            if (Keyboard.GetState().IsKeyDown(Keys.LeftControl))
            {
                if (Keyboard.GetState().IsKeyDown(Keys.S))
                {
                    shopButtonLock = true;
                }
            }
            if (Keyboard.GetState().IsKeyUp(Keys.S) && shopButtonLock)
            {
                shopButtonLock = false;
                shopOpen = !shopOpen;
                mapDraw = !mapDraw;
            }
            #endregion Ctrls
            #region MouseLeft
            if (Mouse.GetState().LeftButton == ButtonState.Pressed)
            {
                mouseButtonLock = true;
            } if (Mouse.GetState().LeftButton == ButtonState.Released && mouseButtonLock)
            {
                mouseButtonLock = false;

                if (shopButton1.Contains(Mouse.GetState().X, Mouse.GetState().Y))
                {
                    //Back Button Clicked
                    shopOpen = !shopOpen;
                    mapDraw = !mapDraw;
                }
                if (shopButton2.Contains(Mouse.GetState().X, Mouse.GetState().Y) && money>=50)
                {
                    playerMaxHP += 25;
                    playerHP += 25;
                    money -= 50;
                }
                if (shopButton3.Contains(Mouse.GetState().X, Mouse.GetState().Y) && money >= 25 && playerDamage<45)
                {
                    playerDamage += 15;
                    money -= 25;
                }
                if (shopButton4.Contains(Mouse.GetState().X, Mouse.GetState().Y) && money >= 150 && !gotTurrent)
                {
                    gotTurrent = true;
                    money -= 150;
                    shopButton4 = new Rectangle((int)screenSizeRounded.X / 2 - 500, (int)screenSizeRounded.Y / 2 - 120, 14 * (28 / 4 * 3), 20);
                }
                else if (shopButton4.Contains(Mouse.GetState().X, Mouse.GetState().Y) && money >= 400 && gotTurrent && turrentDamage<60)
                {
                    turrentDamage += 10;
                    money -= 400;
                }
            }
            #endregion mouseleft
            #endregion KeyChecker
            #region timers
            elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;
            if(mapDraw)
                timer1 -= elapsed;
            if (timer1 < 0)
            {
                spawnZombie();
                timer1 = zSpawnTime;
            }
            if(timer2>0 && mapDraw)
                timer2 -= elapsed;
            if (timer2 <= 0)
            {
                timer2 = 2f;
                shoot = true;
            }
            if(gotTurrent)
                timer3 -= elapsed;
            if (timer3 <= 0)
            {
                timer3 = 1f;
                shootTurrent();
            }

            #endregion timers
            #region playerMovement
            if (playerHP <= 0)
            {
                gameOver = true;
                mapDraw = false;
                playerHP = 0;
            }
            if (Keyboard.GetState().IsKeyDown(Keys.Left))
            {
                playerView = 0;
            }
            else if (Keyboard.GetState().IsKeyDown(Keys.Right))
            {
                playerView = 2;
            }
            else
            {
                //playerView = 1; Enables Front View While Not Moveing
            }

            if (Keyboard.GetState().IsKeyDown(Keys.Left) && playerLoc.X>0+5)
            {
                playerLoc.X -= gameTime.ElapsedGameTime.Milliseconds * 0.5f;
            } if (Keyboard.GetState().IsKeyDown(Keys.Right) && playerLoc.X < (GraphicsDevice.Viewport.Width- player.Width-10))
            {
                playerLoc.X += gameTime.ElapsedGameTime.Milliseconds * 0.5f;
            }
            if (Keyboard.GetState().IsKeyDown(Keys.Space) && shoot)
            {
                bullets.Add(new Rectangle((int)Math.Round(playerLoc.X)+player.Width, (int)Math.Round(playerLoc.Y)+player.Height/2, bullet.Width, bullet.Height));
                shoot = false;
            }
            playerLoc.Y -= playerLocBufferY;

            #endregion playerMovement
            #region collison

            for(int i=0; i<collisonBoxes.Count; i++){
                playerLocBufferY = 0f;
                //Checking bottom
                //if((playerLoc.Y+player.Height)>collisonBoxes[i].Y && playerLoc.X > collisonBoxes[i].X && playerLoc.X+player.Width>collisonBoxes[i].X-32)  Complex collision
                if(collisonBoxes[i].Intersects(new Rectangle((int)Math.Round(playerLoc.X),(int)Math.Round(playerLoc.Y), player.Width, player.Height)))  //Simple collision
                {
                    playerLoc.Y = collisonBoxes[i].Y - (player.Height);
                }
                if ((playerLoc.Y + player.Height < collisonBoxes[i].Y))
                {

                    playerLocBufferY -=3.5f;
                }


            }


            #endregion collison
            #region zombies
            if (!gameOver)
            {
                for (int i = 0; i < zombieLoc.Count; i++)
                {
                    Rectangle rect = zombieLoc[i];
                    if (mapDraw)
                        rect.X -= gameTime.ElapsedGameTime.Milliseconds/8;
;

                    zombieLoc[i] = rect;
                    for (int b = 0; b < bullets.Count; b++)
                    {
                        if (zombieLoc[i].Contains(bullets[b].X + bullet.Width, bullets[b].Y))
                        {
                            zombieHP[i] -= playerDamage;
                            bullets.Remove(bullets[b]);
                        }

                    }
                    for (int b = 0; b < turrentBullets.Count; b++)
                    {
                        if (zombieLoc[i].Contains(turrentBullets[b].X + turrentBullet.Width, turrentBullets[b].Y))
                        {
                            zombieHP[i] -= turrentDamage;
                            turrentBullets.Remove(turrentBullets[b]);
                        }
                    }
                    if (zombieHP[i] <= 0)
                    {
                        killZombie(i);
                    }
                    else if (zombieLoc[i].X < playerLoc.X + player.Width)
                    {
                        Rectangle rect2 = zombieLoc[i];
                        if (mapDraw)
                            rect2.X += 50;
                        zombieLoc[i] = rect2;
                        playerHP -= 25;
                    }

                }
                for (int b = 0; b < bullets.Count; b++)
                {
                    try
                    {
                        Rectangle rect = bullets[b];
                        if (mapDraw)
                            rect.X += gameTime.ElapsedGameTime.Milliseconds * 1;
                        bullets[b] = rect;
                    }
                    catch
                    {

                    }
                }for(int b=0;b < turrentBullets.Count;b++){
                    Rectangle rect=turrentBullets[b];
                    try{
                    rect.X+=gameTime.ElapsedGameTime.Milliseconds * 2;
                    }catch{}
                    turrentBullets[b] = rect;
                }
            }
            #endregion zombies
            #region gameInfo
            if (zombiesSpawned==(wave*3) && zombieLoc.Count>=0)
            {
                    wave++;
                    zombieLoc.Clear();
                    zombieHP.Clear();
                    bullets.Clear();
                    turrentBullets.Clear();
                    zSpawnTime = waveZSpawn;
                    timer1 = 30f;
                    timer2 = 0f;
                    zombiesSpawned = 0;
                    if (waveZSpawn > 1)
                        waveZSpawn -= 0.1f;
            }
            #endregion
            base.Update(gameTime);
        }
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            spriteBatch.Begin();
            #region mapDraw
            if (mapDraw)
            {
                #region tileMap
                for (int y = 0; y < map.GetLength(0); y++)
                {
                    for (int x = 0; x < map.GetLength(1); x++)
                    {
                        int index = map[y, x];

                        if (index != -1)
                        {
                            Texture2D texture = textureMap[index];
                            spriteBatch.Draw(texture, new Rectangle(x * 32, y * 32, 32, 32), Color.White);
                            if (index == 1)
                            {
                                collisonBoxes.Add(new Rectangle(x * 32, y * 32, 32, 32));
                            }
                        }
                    }
                }
                #endregion tileMap
                for (int i = 0; i < turrentBullets.Count; i++)
                {
                    spriteBatch.Draw(turrentBullet, turrentBullets[i], Color.White);
                }
                if(gotTurrent)
                    spriteBatch.Draw(turrent, turrentLoc, Color.White);
                spriteBatch.Draw(playerRight, playerLoc, Color.White);
                for (int i = 0; i < zombieLoc.Count; i++)
                {
                    spriteBatch.Draw(zombie, zombieLoc[i], Color.White);
                }
                for (int i = 0; i < bullets.Count; i++)
                {
                    spriteBatch.Draw(bullet, bullets[i], Color.White);
                }
                spriteBatch.DrawString(font, "Wave " + wave, new Vector2(screenSize.X/2, 0), Color.White);

            }
            #endregion mapDraw

            #region shop
            if (shopOpen)
            {
                spriteBatch.DrawString(font, "Back", new Vector2(shopButton1.X, shopButton1.Y), Color.White);
                spriteBatch.DrawString(font, "Health Upgrade: $50", new Vector2(shopButton2.X, shopButton2.Y), Color.White);
                if(playerDamage<45)
                    spriteBatch.DrawString(font, "Damage Upgrade: $25", new Vector2(shopButton3.X, shopButton3.Y), Color.White);
                else if(playerDamage>=45)
                    spriteBatch.DrawString(font, "Damage Upgrade: MAXED", new Vector2(shopButton3.X, shopButton3.Y), Color.White);
                if(!gotTurrent)
                    spriteBatch.DrawString(font, "Turrent: $150", new Vector2(shopButton4.X, shopButton4.Y), Color.White);
                else if(turrentDamage<60)
                    spriteBatch.DrawString(font, "Upgrade Turrents Damage: $400", new Vector2(shopButton4.X, shopButton4.Y), Color.White);
                else if(turrentDamage>= 60)
                    spriteBatch.DrawString(font, "Upgrade Turrents Damage: MAXED", new Vector2(shopButton4.X, shopButton4.Y), Color.White);
            }
            #endregion shop
            #region gameOver
            if (gameOver)
            {
                spriteBatch.DrawString(lFont, "Game Over.", new Vector2(screenSize.X / 2-40, screenSize.Y / 2), Color.White);
                //spriteBatch.DrawString(mFont, "Press F4 To retry!", new Vector2(screenSize.X / 2-40, screenSize.Y / 2-40), Color.White);
            }
            #endregion
            spriteBatch.DrawString(font, ("Money: "+money.ToString()), new Vector2(0,screenSize.Y-20),Color.White);
            spriteBatch.DrawString(font, ("Health: " + playerHP.ToString() + " / " + playerMaxHP), new Vector2(screenSize.X-130, screenSize.Y - 20), Color.White);
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}