Cool game with amazing pixel art! The soundtrack feels a bit too arcade for my taste—maybe consider adding a spookier vibe, like the part of first stage's music. A tutorial would be helpful, as it took me a while to figure out that I could move boxes by shooting the ghost. It would also be nice to differentiate the moving box from the rest of the level, perhaps by altering its design. Lastly, consider changing the skull icon to a heart. Keep up the great work!