I might be one of the few to say that I didn't enjoy this game, but that's okay.
I enjoyed the music and the visuals, but for most of the game I was bored. It's true that the grandma in this game is heartwarming, but walking parts of the game are just too long, and I feel like the game didn't have any conclusion. You expect something tragic or life-changing to occur to the main character (or to the granny), but nothing ever happens.
In short, if you enjoy relaxing games with almost no story, you'll like Lieve Oma. Otherwise, I can't really recommend this game, but props to the developer for creating a heartwarming experience..