This was cute! Many bugs but the idea is quite nice, I liked the premise of going to sell at cons and the dream of making actual money from them (sigh, /j).
Besides bug fixes it would be cool for quality of life if your stand setup could be saved between runs and then modifiable, and/or to have the auto drop move to the next available slot rather than stay on the same bottom corner.
Art-wise, I found the props funny and the NPCs were super cute and varied and fluffy! The writing was tedious at times since I lacked vision on why I was reading these passages, but it helped build the world.