Very fun! Classic idle clicker loop. I agree with a previous commenter, having to change to the recipes tab is a little annoying, I would have preferred to just always see it somewhere.
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I'm not sure where it would fit best, the immediate thing that comes to mind is to just have the buy/recipe tabs split 50/50 on the right, but I don't know if that would make it too small. You could also have it along the bottom of the screen maybe? I don't think it's a super big deal, once you do each recipe a few times you don't need to reference it as much any long.