becauseを最初に持ってきたい時はカンマいらないですよ！
3文目Playing card gamesです！
あと、3文目でPlaying card gamesは第三者（I,you以外）になるのでmakeにsがつきますよ！
回答
I want to buy card games, because I like to play with them. Also another reason for this is that playing with card games, makes me excited.
疑問は解決しましたか？
