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

namespace MyLittleSimpleSnake
{

    public class SnakeForm : Form
    {
        ...
        public SnakeForm()
        {
            ...
            Timer timer = new Timer();
            timer.Interval = 1;
            timer.Tick += TimerTick;
            timer.Start();
            //if (IsOver)
            //    timer.Stop();
        }

       ...
        int tickCount = 0;

        void TimerTick(object sender, EventArgs args)
        {
            if (tickCount == 0) Act();
            //KeyPreview = true; поможет ли???
            if (tickCount == maxTimeCount)
            {
                StepGame.Move();
                for (int x = 0; x < Game.MapWidth; x++)
                    for (int y = 0; y < Game.MapHeight; y++)
                        Game.Map[x, y] = CreatureType.Ground;
                foreach (var e in Game.Walls)
                    Game.Map[e.X, e.Y] = CreatureType.Wall;
                foreach (var e in Game.Snake.snake)
                    Game.Map[e.X, e.Y] = CreatureType.PartOfSnake;
                Game.Map[Game.Fruit.fruit.X, Game.Fruit.fruit.Y] = CreatureType.Fruit;
            }
            if (Game.IsOver == true)
            {
                IsOver = true;
                //MessageBox.Show("Game Over");
                this.Close();
                throw new Exception("");
            }
            tickCount++;
            if (tickCount == maxTimeCount+1) tickCount = 0;
            Invalidate();
        }

    }
}