Thanks for playing and for the detailed feedback! 💚
The accidental upgrade click is definitely something we noticed as well during testing, so that's a UI thing we need to improve.
And for the building/resource system, you're not the first to mention it. The idea came partly from The King is Watching, where you have to think a bit about what you unlock. But we agree it could be clearer, so that's something we're looking at improving.