Keep the growing garden away by trimming flowers.
Shoot flowers to create groups of 3 or more flowers of the same kind; once these groups are created, those flowers are automatically trimmed.
Red flowers can trim flowers of any color, and they give you more points.
Blinking flowers automatically match the color of the flowers they touch.
If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).