Amazingly cute game, I feel so bad for pulling on the grandma lol. I love the cut-out graphics. There's a lot of games with tug-and-leash mechanics, but this game is one of the better ones because of the setting behind it. It's a dog tugging its owner everywhere, so it just makes sense, and you don't have to give the player a tutorial or anything on how to play. For the soundtrack, I would have preferred some instrumentation with the drum loop, but that's just a personal preference thing.
I actually disagree with the comments saying that it's not hard enough. Not every game needs to be challenging, and this one works perfectly fine as a chill and relaxing game. I do, however, agree that the goal isn't clear. When I first played, I thought it was gonna be an endless type of game until I saw the gate. What I'd do is, when the game starts, have the camera over the gate first with an arrow pointing at it, then pan to the player. I'd also give the birds and the trash can a different color outline to indicate that they can be interacted with, or a border like with the fire hydrant. Everything has a white outline and also happens to be an obstacle, so having a yellow or red outline over the collectible objects would make them stand out more.
Great game overall. I thoroughly enjoyed playing through it.