I will have to admit that Midjourney nailed that Whimsical Treehouse prompt. I think your drawing captured it a lot. Using just markers felt like it gave the drawing, for lack of a better term, airiness. It had less rigidity and structure, but you can still clearly see the form. It has a sort of a magical feel to it.
Midjourney always have this fantasy results and sometimes you can tell something's Ai based on the style lol. They're usually good especially now they've improved a lot. Thank you! Glad you like it