Cool puzzle concept! The art is minimalist but aesthetic. The situations in the levels are quite morbid, maybe you could write a little backstory for the game to add some extra flavor.
Small nitpicks: The first time I started the game, after pressing START I didn't realize that the next screen was a level select screen, and I tried using keyboard controls (it could maybe be improved by adding some text like "select level", or other graphics). Also hovering the buttons with the mouse changes the color an extremely slight amount, too subtle to make it clearly look like a button imho.