This game is awesome! Love the 8-bit style aesthetic very nostalgic and the music sounds great with it too. The concept of using possession mechanic to beat the level is really interesting and fun, though I do feel a little bit frustrated that on top of losing health to foes and the environment, I also lose health when I miss. Could either make less monster a foe or reduce the punishment of missing. Perhaps foe in the starting region, say the turtle, doesn't damage the player so they can get a feel of the game mechanic before more variables are added.
So yeah, that's about it for my feedback, really enjoy it and I can see lots of potential in it, well done!