There are various ways to express "in an amusing manner". One can say "jocularly" or "wittily" if the intention is to add some humor to the situation. Another synonym could be "facetiously" which emphasizes the humorous intent. One could also use "lightheartedly" or "playfully" if the emphasis is on creating a relaxed and cheerful atmosphere. If one wants to highlight the irony in a situation, "sarcastically" or "satirically" could be used. Additionally, "comically," "humorously," or "jovially" would be appropriate when describing something that is intended to be funny or light-hearted. Choosing the right synonym will accurately portray the intended tone of the situation.