Really love the concept, the art is solid (I really like the little animations for the ghost, they're really smooth and look great) and the music and sound effects really fit the retro spooky vibe of the game.
I haven't managed to reach my ghostly family yet, I think at most I've managed to get about 5-6 rows up, will have to play a bit more.
I'm not sure if it would make the game too easy but my only thought is perhaps you could have a double jump or some ability to hold onto the side of blocks so you can more easily climb up. Really nice work!