I like the overall style of art for the ghost, the backgrounds, and the people, but the platforms and spike traps seemed to all be of a completely different art style. The variety of locations was also neat, but there wasn't really a cohesive narrative going on. If you added some dialogue and tweaked the art style for your platforms, you could use the existing assets to make something really cool.

tl;dr: really good art style and stable mechanics, but lacked a cohesive narrative. Would absolutely play something with a story that utilizes these assets.