Quests - Towards the top but below the top bar showing currencies, you'll find Quests. Starting on level 3 players will have 3 active quests at any given time. Quests are the best way to earn loot.

Resources - On the middle bar, below each building you'll find the amount resources you currently have that is produced within that building. These resources are required to purchase more of each production line. For example, to purchase one plant requires 11 buds. In this screenshot we can see the player has 392 buds.

Production Button - The green circles indicate the buttons that start production for each production line. Once the player has earned some upgrade cards, these production lines will become automated so there is no more tapping.

BUY Button - This button purchases the specified number of that productioon line. The green button on the right side of the mid bar (showing x1) allows you to change the quantity purchased with one press of the buy button.

Costs - Above each production line the costs to purchase 1 unit is shown.

How Many Owned - How many of each production line you already own is the number under the Clones Icon on the pink background. This production line already owns 84 units.

Production Upgrades - In the bottom right corner is the Green Upgrade button, if it's green that means there is an upgrade available. If its blue, that means there is no upgrade currently available.

Cash - As you acquire more units of each production line, it generates cash that can be collected. We can see this production line has 600 cash ready to be collected. The pink bar indicates the progress to the next cash production.