Cool crafting game ! I like the roguelike upgrade mechanic, even though I think it made me a bit too powerful too fast, I just stacked upgrades that doubled the value of my scales and helped produce it faster, and just sold them directly, and that made me win the game ^^'
Having one screen for the shop and one for crafting is a bit tedious, as one always have to switch between the two to know what to craft.
Besides those few points, really good job, that's a beautiful game that kept me playing for a while !