Wow, so this took a while to work out what to do - I think you need a more solid tutorial as I had to go back to the reference game to understand the mechanics. After I did, though, and then came back to this, it all clicked. This is actually a really cool idea, and I think you've taken the original game's idea onto a new place of your own, and it can definitely work - cute sprites and music, I like that, and the feel of the UI and world map is nice. I think you need to make sure the theme is consistent - tractors and ancient-looking tribes don't mix, maybe make the decor appropriate to a more fantasy/ancient-style setting. The game loop is clever and I can see it being pretty addictive with some polish - mainly on explaining what the object of the level is, and how the time is very limited so you need to get to the trading point ASAP with your recipes etc. I think you need more resources and definitely try and make movement down to mouse click instead of dragging the object, it took me ages to understand I had to do that :D
Great effort on a complicated idea in a very short time, I hope you carry on with this concept and expand it, because I think it can definitely work.