A game I am working on in my class.

CarGame

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 Scrolling.cs
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        enum GameStates { TitleScreen, Playing, PlayerCrash, GameOver };
        GameStates gameState = GameStates.TitleScreen;     

        Texture2D cone;
        Texture2D titlescreen;
        Texture2D background;
        Texture2D car;
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;        
        private float titleScreenTimer = 0f;
        private float titleScreenDelayTime = 1f;

        Vector2 coneVelocity = new Vector2(0, 1);
        Vector2 location = new Vector2(0, 0);
        Vector2 stands = new Vector2(0, -1);
        Vector2 carlocation = new Vector2(30, 400);

        public List<Vector2> conePositions;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        

        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here

            base.Initialize();
        }

        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);

            cone = Content.Load<Texture2D>(@"Obstacle");
            titlescreen = Content.Load<Texture2D>(@"titlescreen");
            background = Content.Load<Texture2D>(@"background");
            car = Content.Load<Texture2D>(@"car");


            conePositions = new List<Vector2>();
            conePositions.Add(new Vector2(1300, 1));
            conePositions.Add(new Vector2(1600, 0));
            conePositions.Add(new Vector2(1900, 1));

            // TODO: use this.Content to load your game content here
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// all content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        private void ResetGame()
        {
            carlocation.X = 30;
            carlocation.Y = 400;

        }

    


        /// <summary>
        /// Allows the game to run logic such as updating the world,
        /// checking for collisions, gathering input, and playing audio.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            if (gameState == GameStates.Playing)
            {
                location.X += (float)gameTime.ElapsedGameTime.TotalSeconds * 700f;
                stands.X += (float)gameTime.ElapsedGameTime.TotalSeconds * 100f;
            }
            //conePosition.X += (float)gameTime.ElapsedGameTime.TotalSeconds * -325f;


            // Check for collisions
            foreach (Vector2 conePosition in conePositions)
            {
                Vector2 conePos = conePosition - location;
                conePos.Y = 330 + conePos.Y * 60;

                if (Vector2.Distance(conePos, carlocation) < 50)
                {
                    // Collision!
                    ResetGame();
                }
            }
            

            KeyboardState ks = Keyboard.GetState();

            if (ks.IsKeyDown(Keys.Up))
            {
                carlocation.Y = 330;
            }

            if (ks.IsKeyDown(Keys.Down))
            {
                carlocation.Y = 390;
            }

            
            base.Update(gameTime);
        }

        public void DrawBackground(Texture2D bkg, int xofs)
        {
            xofs = xofs % bkg.Width;

            // Calculate which two source / destination rectangles to use based off of xofs and this.Window.ClientBounds.Width
            spriteBatch.Draw(background, new Rectangle(0, 0, bkg.Width - xofs, this.Window.ClientBounds.Height), new Rectangle(xofs, 0, bkg.Width - xofs, bkg.Height), Color.White);
            spriteBatch.Draw(background, new Rectangle(this.Window.ClientBounds.Width - xofs - 8, 0, xofs, this.Window.ClientBounds.Height), new Rectangle(0, 0, xofs, bkg.Height), Color.White);

            // Draw stands
            xofs = (int)stands.X % bkg.Width;
            spriteBatch.Draw(background, new Rectangle(0, 0, bkg.Width - xofs, 290), new Rectangle(xofs, 0, bkg.Width - xofs, 349), Color.White);
            spriteBatch.Draw(background, new Rectangle(this.Window.ClientBounds.Width - xofs - 8, 0, xofs, 290), new Rectangle(0, 0, xofs, 349), Color.White);

            // Draw cone
            

        }

        /// <summary>
        /// This is called when the game should draw itself.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Draw(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            switch (gameState)
            {
                case GameStates.TitleScreen:
                    titleScreenTimer +=
                        (float)gameTime.ElapsedGameTime.TotalSeconds;

                    if (titleScreenTimer >= titleScreenDelayTime)
                    {
                        if ((Keyboard.GetState().IsKeyDown(Keys.Space)) ||
                        (GamePad.GetState(PlayerIndex.One).Buttons.A ==
                        ButtonState.Pressed))
                        {
                            gameState = GameStates.Playing;
                        }
                    }
                    break;



            }
            GraphicsDevice.Clear(Color.CornflowerBlue);
            spriteBatch.Begin();
            if (gameState == GameStates.Playing)
            {

                //spriteBatch.Draw(background, new Rectangle(0, 0, this.Window.ClientBounds.Width, this.Window.ClientBounds.Height), Color.White);
                DrawBackground(background, (int)location.X);
                spriteBatch.Draw(car, carlocation, Color.White);

                foreach (Vector2 conePosition in conePositions)
                {
                    if (conePosition.X >= location.X && conePosition.X <= location.X + this.Window.ClientBounds.Width)
                    {
                        spriteBatch.Draw(cone, conePosition - new Vector2(location.X, 0) + new Vector2(0, 325 + conePosition.Y * 50), Color.White);
                    }
                }
            }
          

            if (gameState == GameStates.TitleScreen)
            {
                spriteBatch.Draw(titlescreen,
                    new Rectangle(0, 0, this.Window.ClientBounds.Width,
                        this.Window.ClientBounds.Height),
                        Color.White);
            }

            spriteBatch.End();
            // TODO: Add your drawing code here

            base.Draw(gameTime);
        }
    }
}