It's from one guy? If that's the case, it's very impressive.
It looks like a really good and refined 2D game you'd have bought on the SNES, or maybe the PS1 or Saturn (Saturn was quite a 2D powerhouse). I do like the graphics and the calming music (again, if that's from one guy and he's also good enough to compose something like that, then please someone Fedex the guy a box of cookies). It's not my type of game though, never played Harvest Moon either. But I can definitely understand why some people would love it. And the Steam page shows overwhelming positive reviews for now, good thing for the developer, he deserves it.