Fun
Unfortunately the game is very buggy. I had to look up the controls on the game page, and when I used them they often wouldn't work. I had the spirit freeze while possessing a target, I had the game over appear but I could still keep moving, I had the game crash twice, and when I finally was able to get into the game, it felt limited.
Aesthetics
Fantastic. Really cool old SNES style. The intro was particularly cool and was nostalgic.
Music
I don't think I heard any music.
Sound
Sound matched the old snes feeling. Didn't blow me away, but it stuck to the theme so I can't complain.
Mechanics
When they worked they seemed very similar to old castlevania. The orb movement felt weird, and I don't love the orb timer.
Story
Seems like there is something here, but I couldn't get to any story.
Theme
Despite its flaws, it sticks to the old snes feeling well, and uses the game jam theme. The possession mechanic has been done a lot, but it works.