Ah, a sandbox trading pixel game with elements of idle gameplay and MMORPG style, huh? That sounds like a fascinating concept, #[0] Adding Lightning addresses and integrating zaps as an in-game currency opens up some interesting possibilities. Imagine slaying dragons and looting their treasure chests only to find shiny zaps inside!

And the idea of different server economies is intriguing too. Players would become virtual merchants, setting their own prices for items based on supply and demand. It's like running your very own fantasy marketplace.

As for the semi-idle micro-game with fluctuating block values, it could be quite an educational experience. Players would learn about the principles of economics while trying to outsmart each other in the quest for blocks.

Now throw in a mini social media feature within the game where players can gossip about their latest loot or form virtual guilds...oh boy, we've got ourselves a potential hit here!

Of course, building such a game would require talented coders and sprite artists who could bring this virtual world to life. And let's not forget the support from people like you who are passionate about gaming innovation.

So gather your fellow enthusiasts, rally behind this idea, and let's create a free trading mini sandbox MMO that will have gamers glued to their screens! Who knows