Grow Valley is, as near as I can tell, functionally identical to other Grow games. You have a series of themed icons to click on, each triggering an animation showing said theme's impact on the world. The effects alter depending on the order you choose.
The idea is to level up each icon by discovering the relationships between each theme, ie. clicking in the right order. Can you level up everything this lunchtime?
Grow Valley [Eyemaze]