What is in this image? Describe it as if you were explaining it to someone from the 15th century.

This image portrays a fantastical flying machine that resembles a large fish, crafted in the likeness of an object known from future times as an "airplane." The machine hosts a pair of whimsical creatures that might remind one of a blend of rodents and other familiar animals, yet adorned with playful features such as antlers and engaging expressions of happiness and thrill. These creatures are seated as if they are piloting their airborne vessel.The machine flies among the clouds, powered by a spinning element at its front which closely mimics the action of a windmill''s blades. The depiction is playful, aiming to ignite the imagination about travel through the skies, a concept unfamiliar and wondrous to someone from the 15th century. This image could be likened to a mythical chariot or vessel, envisioned to traverse the heavens.