That deity is Krishna, the descendant of Vrishni, the ancient supreme lord, the inconceivable Hari, the mighty-armed hero, who seems to sport (in the world).
स एष कृष्णो वार्ष्णेयः पुराणपुरुषो विभुः। आस्ते हरिरचिन्त्यात्मा क्रीडन्निव महाभुजः॥