private void Initialize()
{
timer.Stop();
time = 0;
level = cmbxLevel.SelectedIndex + 1;
lblMines.Text = MINE_COUNT[level - 1].ToString().PadLeft(4, '0');
lblTime.Text = time.ToString().PadLeft(4, '0');
btnPlay.BackgroundImage = Properties.Resources.happy;
cells = new int[BOARD_SIZE[level - 1], BOARD_SIZE[level - 1]];
surface = new Bitmap(this.canvas.Width, this.canvas.Height);
device = Graphics.FromImage(surface);
device.SmoothingMode = SmoothingMode.AntiAlias;
game = new Game(MINE_COUNT[level - 1]);
game.fillBoard(cells);
draw();
}