Fun, cute game with tons of charm!
You have to water flowers so that they grow, dance for white flowers to make new buds, and keep smoglings from turning your flowers black. So basically, your progress is measured by how many flowers you have grown. At first this seems like the only thing that you do in the game(and the game can be difficult to get into at first because of constantly keeping up with your battery which runs low often), but there is much more to it. There is a town to visit, where you can make and recruit friends to build things for your park. This adds more to the game, because you can build structures which are actually mini-games. They are good to break up the tedium of constantly tending to your flowers.
Your currency is watts, which you get from Happy Points. Watts can be used to buy useful things, like battery upgrades and park structures. You can get Happy points by finding a friend a favorite treat, doing well in a mini-game, selling flowers to the flower shop, and such.
The graphics are almost blindingly bright, but they suit such a cheerful game very well. The sound is nice too, because there is music that goes to pretty much whatever you're doing (like riding a bike, walking, or watering flowers).
All in all, the game is difficult to get into at first, but if you have patience and a tolerance for slow-paced games, then do yourself a favor and try this.