Good implementation, and works on mobile.
Unfortunately it does not feel like something "made for the jam" as it is a known existing game concept re-executed for web. This is nice, but it is only "crafting" in the sense that stacking blocks is... technically crafting.
Crafting theme was optional for the jam, but still the decision not to include it and the known space of this genre makes this game feel like a coincidence entry.
None the less it's very well done!