As a botanist and a gamer, Reach for the Sun makes me feel both sad and embarassed. It is not a fun game, it is not a good learning tool, and the lessons that it does teach are often inaccurate. Yet, somehow, the game has won several awards, and this really does make me sad. To give this game an award is to suggest that this is the best we can do. That suggestion is disrespectful to the potential fun within the subject matter, and disrespectful to gamers' proven ability to create great games.
In brief, the gameplay is all about clicking. Even in strategy mode, it's all about the clicking. However, that's just a minor flaw, a flaw that pales in comparision to the big-picture gameplay flaws and botanical lies that are told by this game.
Firstly, as a player, you don't have much agency. You can't grow your plant whatever way you like. Instead, each plant has a preset fully-grown shape, a shape that was fixed by the developers at compile time. When you add new parts to a plant, you're really just unlocking bits of that preset shape. Thus, success requires learning the shape of the fully-grown plant, and then discovering the series of choices that allows you to most quickly unlock all the parts.
As a botanist, I teach that plants cannot choose their environment, as each seed must grow where it falls. However, plants can *adapt* to their environment by choosing how they grow. A bush on a rocky cliff may grow short and squat so as to protect itself from \damage by cold and wind, while a bush in a shady glade may grow tall and slim so as to try and stretch above the other plants, and grab a share of sunlight. Thus, the idea that each species of plant has a fixed shape (an idea implicitly taught by this game) is false and misleading.
The biggest flaw in the game is the lack of differentiation among plants. While there are several different types of plants in the game, from a gameplay standpoint, they're pretty much the same. From a gameplay perspective, this makes things kinda boring. From a botanical perspective, this is just plain untrue. The joy and beauty in life and biology come from from the huge variety of natural forms and behaviors. To teach otherwise, as this game does, is a terrible lie.
If you're looking for a bit of variety in your procrastination, something to give you a break from Peggle or Candy Crush, then you may find a bit of enjoyment in this game. If you're looking for something with replay value or educational value, you should look elsewhere.