click the red button to gain flowers
click the flower to money icon in the bottom right of the screen
click on the trowel or gardener buttons to buy upgrades to help you gain more flowers.
to show of your web gardening skills, you can prestige! after you have 1 million flowers, you can click the prestige button which will set you back to 0. This gives you a chance to feel what it was like to be a noob again and start another gardening journey!