This is a really neat idea and you did a good job on the visuals, but it needs a tutorial and/at least an explanation of what to do in the description under the game. It took me several tries to find something I actually was allowed to create (a stump), which seemed random until I noticed a wood stat increasing in the upper right corner.
This next point is probably a "me" issue since other commenters seem to have been able to get through the game, but I never could buy more then one item. I'd click on either a rock or a stump, add it too the map, go back to Builds, click on the one I did not buy yet, click the map, but the resource would still be "set" to the first one, leaving me with either two rocks or two stumps and not enough resources to do anything else. Is there something I am missing?