Very cool idea and nice execution! It's very impressive to have the pathing system working so well alongside an upgrade tree!
As other mentioned, the tutorial and general learning of the game is a bit overwhelming.
One possible fix could be some adjustments to the colors/artwork. I think the art and visuals are nice overall, but it's hard to see what parts of the screen are most important. For example, the ground/grass is "less important" than the stones and other resource objects. Maybe some higher contrast artwork for the important objects and lower contrast artwork for more background elements could help organize the information on the screen. Outlines would also probably work just as well.
Hopefully that helps a bit! Making a complex game and then having to explain it in a clear way is super difficult. Great job making a game so deep within the time period!!