Overall a fun building and crafting game. I enjoyed the background song and enjoyed the main gameplay loop of the game.
If you wanted to improve, I suggest adding in some UI enhancements. For example, have a check or an x in the corner of an item to show if you have the components to craft it or not. Also give some sort of feedback when an item is build, I often times was confused if I had actually had anything built or not.
Overall a solid core for a fun crafting / building game, just needs a little more polish on the UI