A speaker describes someone's eyes using the language of autumn. The poem is headed by the name "Madi" and the word "Pumpkins" in quotation marks, which reads like a pet name or nickname. That detail suggests the poem is a small, affectionate tribute to a person the speaker feels close to.
The central comparison is simple: big, bright brown eyes are "like October." Instead of just saying the eyes are brown, the speaker turns the colour into a season, with its leaves, its softer light, and its sense of comfort. The "sweet, fall undertones" add a hint of taste and smell, as if the eyes were something baked or spiced. The short closing line, "Warm and cozy," sums up the feeling in three words.
The mood is gentle, tender, and snug. Nothing dramatic happens. The poem just lingers on a feeling of affection, and its brevity makes it seem like a quiet compliment said softly.