I liked the idea of having a zombie and their own ghost working together to solve puzzles. That was kind of fun. I also liked the sprites and the animations.
There are some improvement opportunities I'd like to point out:
- I didn't notice the dialogue box until I had tried to solve the puzzles on the first room at least a couple of times. I could move both characters right from the start, before any of the text had been read. It would be better to have the dialogue on a more prominent location or make it stand out more and require that it's finished before letting the player move around (at least in the first screen).
- I'm pretty sure I skipped part of the story by moving to the next screen before finishing the text.
- When switching character without letting go of the movement key, the previous character will keep moving in the last direction instead of stopping.
- The music loop is VERY repetitive.
Good job!