Nice work, I like the premise of exploring a park for this game. The sprites overall have good design, but the color choices feel like they clash a bit, the pink, green and yellow are all similar levels of saturation and brightness, so they don't stick out much, I might make the items either brighter or darker to make them pop more. The first room seems to have three possible exits, but only the right side and top go to other rooms, I would close up the area at the bottom that looks like it leads to another room. It also seems strange that the player finds the key to their house in the park, but we don't know that they left it there, it might make more sense to set up that we're looking for the key.