Please can you advise the sunnah way of dusting the bed before sleeping? Should it be done anytime I want to sleep somewhere or only at night? Regarding playing console games, is it permissible to do so if you are controlling a human character, and exploring the sea catching fake fish etc?

Dust the bed with the edge of your garment when you come to it, and in al-Bukhari it is three times, and the narration mentions it again for one who gets up from his bed and returns to it. As for the game, it is allowed if it contains nothing forbidden and does not turn you from the prayer or your obligations.