Congratulations on your first solo work! It came out as a cute little game! :)
Minor things:
I finished the game on the first try without understanding what the duster is used for. So I restarted the game and discovered that apparently no dust piles spawned for me when I first played the game. I do not know what causes this issue, I restarted a couple of times, and it is seemingly random.
This is a personal preference, but I would be glad if you allowed the full screen option (in itch, within the edit options). Since the camera is tied to the mouse, changing browser tabs / alt-tabbing desyncs the cursor from the game. Allowing full screen would counter this.
A simple soundtrack would make a world of difference, I think.