who quelled the fire of the Muñja thicket
Pacifier of the fire in the Muñja forest — when a second great forest fire breaks out and traps the cowherds, Kṛṣṇa swallows it; he tells them to close their eyes and they open them to safety.
मुञ्जाटव्यग्निशमनः प्रावृट्कालविनोदवान् ।शिलान्यस्तान्नभृद्दैत्यसंहर्ता शाद्वलासनः॥
muñjāṭavyagniśamanaḥ prāvṛṭkālavinodavān ·śilānyastānnabhṛddaityasaṃhartā śādvalāsanaḥ
who quelled the fire of the Muñja thicket
Pacifier of the fire in the Muñja forest — when a second great forest fire breaks out and traps the cowherds, Kṛṣṇa swallows it; he tells them to close their eyes and they open them to safety.
who passed the rainy season in delight
Who plays in the rainy season — S.B.G 10.20 describes the rainy season at Vṛndāvana through Kṛṣṇa's enjoyment of every phenomenon — clouds, frogs, peacocks, new grass.
who took up the food laid out on the rocks
Eating food laid on flat stones — for the forest lunches, the boys use flat stones as plates; Kṛṣṇa's enjoyment of food laid on stone is itself an aesthetic ideal.
destroyer of the demons
Destroyer of demons — generic but referring to the long series in Vṛndāvana: Pūtanā, Śakaṭa, Tṛṇāvarta, Vatsa, Baka, Agha, Dhenuka, Pralamba, Vṛṣabha, Keśin and others.
who sat upon the grassy sward
Seated on grass — when the gopīs see Kṛṣṇa in the Veṇu-gīta episode, he is sitting on the grass playing his flute; this 'grass-seat' becomes a key visual.