This game has an interesting and unique tone - a mix of stressful, unpleasantness, and dirtiness combined with beautiful and royal things. That was neat to me. The art was unrefined, but at least had a unique style. The game was fairly easy to play but still a bit of a challenge, so it seemed a good difficulty level for kids, I think. And thanks for including a map (I personally always like having maps)!
(Mild spoilers in the rest of this review) I noted some suggestions: There could be more descriptions when the player examines stuff, even for un-important features just for fun, e.g. the books (look for all nouns in your descriptions). And some more synonyms could be added (e.g. "axe" should work as well, not only "pickaxe"). For the art, I suggest using png overlays with transparency, e.g. so when the mole leaves, the icon in the image disappears too. Search "overlay" on the Adventuron Cookbook page for example code, and let us know on the Discord server if you need help. It would have been nice to have a mole image, and a unicorn, at the appropriate places. And have them leave using the overlay feature.
I like that we get to help the unicorn twice - once around the middle and once at the end. And I personally didn't mind the one empty room with no purpose, it seemed like a bit of extra silly fun! =P