YOU SAID:
this guy is playing cuphead
INTO JAPANESE
この男はカップヘッドを演奏している
BACK INTO ENGLISH
This guy is playing a cup head
INTO JAPANESE
この男はカップの頭を演奏している
BACK INTO ENGLISH
This guy is playing the head of a cup
INTO JAPANESE
この男はカップの頭を演奏しています
BACK INTO ENGLISH
This guy is playing the head of a cup
That didn't even make that much sense in English.