My Kingdom for the Princess

When handsome prince and charming princess got married, they received the most neglected piece of land in the whole kingdom as a wedding gift from the king. Well, it is not exactly what they were expecting to get from their father, but prince showed his will. He said that he will transform this poor part of the estate into a real kingdom, which would match the beauty of his love. Can you help him with this difficult task? Get to the heart, before it gets dark outside. Have fun.