Using two artworks by the same artist helped them feel cohesive and they were perfectly suited to the adventure. The goat-headed goblins and Wind-shadows are both great ideas and begging to be drawn too!
You did a good job capturing the feeling of an abandoned city (spa-town in this case).
For usability at the table, I think it would help to have the most important details of descriptions bullet-pointed or presented in brief and to provide full stat blocks for the monsters.