I liked the theme and the presentation. As others said, it took a little while to figure out what was going on. While a tutorial would help, I think the bigger thing would be providing more feedback on the click-able elements, and making it more clear when/why something isn't doable.
In terms of the gameplay loop, the concept of having to remember and find the base ingredients required for someone's order could work towards something interesting. However as things are, wood was such a bottleneck for me that it mostly didn't matter what I harvested.