hello, I am a enthusiast of your game, and would like to share my thoughts about this release.
It is interesting to be able to customize the shop, yes, but the issue I have with this aspect of the game is the entire shop mechanic itself.
It is not transparent to understand exactly what is going on, these changes you are making do improve a bit, yes, but it still feels lacking, like I shared on the reddit, I believe the shop should have a entire in depht rework in order to make the mechanic more appealing and immersive, there should be a entire set of skills and stats designed only for the shop, like for combat you have attack, defence, etc.
For the shop, these should be transparent stats that you could improve by levels of experience earned through sale, where you would invest points on shop skills, like sale profit %, customer attaction, number of itens per stack, shop reputation and supplier attraction, yes, supplier, because as your shop grows, it should attract artisans and adventurers interested in selling stuff to you, so you can resell or use as equipment or crafting materials.
The customization you are adding would then work like equipment on a fighter, to improve the skills I mentioned, this idea of gloomy or bright, or even poor / rich I find kinda unnatractive to be honest, like, if the shop has reputation for quality products, the appearance should not matter much at all