Cool game! Spooky and concept relevant to the theme. Each level feel different and the graphics make a great use of the two colors restrictions. That may be just me but I would have loved to see to see a tad more elaborate walk cycle for instance by inserting a frame (in which both head and shoulders of the character are 1 pixel lower end both feet are on the ground) between you existing frames.
That's a great exploration game! and I love that 1bit halo effect!