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C#-Quelltext

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 Snake_no2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Timer timer = new Timer();
        Random random1 = new Random();
        Random random2 = new Random();

        short headX = 170;
        short headY = 170;
        byte circleW = 10;
        byte circleH = 10;
        int score = 0;
        int rndFutterX;
        int rndFutterY;

        byte richtung = 0;

        private void Form1_Load(object sender, EventArgs e)
        {
            this.Paint += Form1_Paint; //wird benötigt um Kreis bei Programm-Ausführung zu zeichnen
            timer.Interval = 1000;
            timer.Tick += new EventHandler(Update);
            timer.Start();

            rndFutterX = 10 * random1.Next(0, 35);
            rndFutterY = 10 * random2.Next(0, 35);
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            SolidBrush playerBrush = new SolidBrush(Color.Red);
            Graphics grafik = this.CreateGraphics();
            Rectangle circle = new Rectangle(headX, headY, circleH, circleW);
            //grafik.DrawEllipse(Pens.Red, circle);
            grafik.FillEllipse(playerBrush, circle);

            SolidBrush foodBrush = new SolidBrush(Color.Blue);
            Graphics futter = this.CreateGraphics();
            Rectangle rekt = new Rectangle(rndFutterX, rndFutterY, 10, 10);
            futter.FillRectangle(foodBrush, rekt);
        }

        private void Update(object sender, EventArgs e)
        {
            if (richtung == 1)
            {
                headY += 10;
                this.Refresh();
            }
            if (richtung == 2)
            {
                headY -= 10;
                this.Refresh();
            }
            if (richtung == 3)
            {
                headX -= 10;
                this.Refresh();
            }
            if (richtung == 4)
            {
                headX += 10;
                this.Refresh();
            }
            //Schlange an Rand
            if (headY == 360 || headY == -10 || headX == 360 || headX == -10)
            {
                timer.Stop();
                MessageBox.Show("Game Over. Your Score: " + score);
            }
            //Schlange auf Futter
            if (headY == rndFutterY && headX == rndFutterX)
            {
                rndFutterX = 10 * random1.Next(0, 35);
                rndFutterY = 10 * random2.Next(0, 35);
                score += 1;
                if (timer.Interval > 250)
                {
                    timer.Interval = timer.Interval - 250;
                }
                if (timer.Interval > 100 && timer.Interval <= 250)
                {
                    timer.Interval = timer.Interval - 50;
                }
                if (timer.Interval > 20 && timer.Interval <= 100)
                {
                    timer.Interval = timer.Interval - 20;
                }
                if (timer.Interval > 2 && timer.Interval <= 20)
                {
                    timer.Interval = timer.Interval - 2;
                }
            }
        }


        public void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Down)
            {
                richtung = 1;
            }
            if (e.KeyCode == Keys.Up)
            {
                richtung = 2;
            }
            if (e.KeyCode == Keys.Left)
            {
                richtung = 3;
            }
            if (e.KeyCode == Keys.Right)
            {
                richtung = 4;
            }
        }
    }
}