public void StartGame()
{
//OMG! if the player won :)
if (PlayerPrefs.GetInt("Score") != 0)
{
player_scores = PlayerPrefs.GetInt("Score");
}
StopAllCoroutines();
ui_controller.RefreshTimeUI(step_time);
ui_controller.RefreshScoreUI(player_scores);
game_field.localPosition = Vector3.zero;
GenerateNewField();
}