It was a good game I had fun playing it, however

It took me a while to figure out that I was the wizard so I was just upgrading the carpenter the whole time.

I also read the comments after I finished the game while I was just slowly upgrading the tech tree all the way, and saw that there was another character called the druid, I still have no idea how to get this character I assumed it was on one of the earlier levels with the exclamation points next to the diamonds but anything I did on those levels didn't bear any fruits.

overall it was fun to just mess around. In the future of progress there should definitely be like a shop of some kind where you can buy like items or sell some of your recourses for gold or another form of currency because after you upgrade everything needed for one resource it becomes useless.