I like the art! I think it's really cute. However, I think you focused too much on art... which made the gameplay not very fun to play. (I made this mistake also lol)
As for the gameplay, I feel lost on what the goal is... you could provide the player a bit more info by providing texts while the player roams or npcs like the controls, how to unlock parts of the map, how to get keys, and how to win the game. The player was sticking to the invisible walls and the sides of the platforms which made it really frustrating to move around the map.