Your main feature is the plant, click it while bubbles are coming from it for it to release gems! Then click the gems to collect :D At high levels it will create more! :D The magnet will automatically create and receive gems :D At high levels it will get gems very quickly! The hammer automatically creates gems but you have to collect them. At low levels it is not too good but at max level it is the BEST thing on your farm by far :D Use your gems to upgrade stuff in your farm!