Moomintroll: Winter's Warmth is a sequel to Snufkin: Melody of Moominvalley, where players follow Moomintroll as he wakes from hibernation in a snowy landscape and embarks on a quest to bring spring. The game emphasizes Moomintroll's proactive role in helping Moominvalley residents during winter, contrasting with the themes of uncertainty found in Tove Jansson's original book, Moominland Midwinter. The game focuses on perseverance, camaraderie, and courage, aiming to provide a comforting experience while subtly altering the narrative's message. The original work's theme of resilience is echoed in Moomintroll's encouragement for the crocus to struggle through the frost, highlighting the beauty in overcoming adversity.