Garden: tap a bed to plant (Mint is free), tap again to water. Tap a ripe bed to harvest it into your seed bag.
Board: only herbs in your seed bag sprout here. Swipe to match 3; matches fill your pantry.
Brew: chop and grind herbs in quick mini-games, put 3 jars in the pot and stir a figure-8. Wrong mixes make sludge, but the Book keeps hints.
Elements: working the garden turns up earth. At the vat, the valve is a pipe puzzle that gives water, and the bellows give fire (long, slow pumps) or air (quick taps). Elements build machines in TOOLS › Workshop.
Shop: sell potions for gold (or drink them for power-ups). Gold buys tools; notes from experiments buy research. The coach shows you the rest.