That was cute. In an era where it seems like most hidden object games have to be "adventure" games with a plot a mini-games and all that, it's nice to see one that goes back to the basics of just finding objects. The interaction is nice and somewhat novel (once you figure it all out), and the visuals are great.
I would say there are two main issues for me. The first is that it was sometimes hard to figure out what exactly you were trying to accomplish. In the end I was able to complete it, but it just felt like some goals should have been a bit more obvious. Second, some of the tasks were just tedious. If you're going to have several "get multiples of these" quests, maybe a few less items per, specifically the cats and birds. And while searching the windows was clever, that was also a bit much, especially since the interface to drag open the windows was a bit finicky.
Overall, I think this is a great start to a hidden object game, and I hope you have plans on expanding it in the future.