HM: Back to nature is just the beginning of a good series that gets repetitive very quickly.
On HM you are boy whose grandpa died and you must take care of his farm. However, you have 3 years to put the farm back on its original shape and befriend the villagers of Mineral Town (where the action takes place)
On the farm you can raise chickens, sheep and cows. You can also raise a dog and a horse and catch fish.
You can also plant lots of different crops and harvest them. The main purpose of 'a day' in HM is to sell as much as possible. You can sell pretty much everything, even stuff you can collect on the nearby mountains.
On the town you have a variety of shops, each with a schedule and a cute family running it. There is a clinic, in case you work too much. The supermarket where you buy seeds and stuff for cooking (yes you can cook but it's very lame), a blacksmith to upgrade your tools such as the watering can and some other shops which I consider useless. You will also find a small cottage inhabited by what everyone calls 'harvest sprites'. These small guys will help you on the farm at the price of gifts.
On each month there are around 4 festivals. Cooking festival, horse race and many more, but they are only fun at first come, so at the second year of game-play, you'll find yourself doing the same over and over again.
There's one background music per season which gets very repetitive and annoying quickly.
One of your goals is to get married. The process of trying to get married though it may be repetitive is very enrolling.
So, after one year in HM you will basically do the same stuff over and over again - wake up - feed animals - water crops - befriend people and that's HM for you.