This was great! Loved the possession mechanic. It reminded me of that old game on my N64 space station silicon valley where you have to take control of all the different creatures and they all have their own abilities to get through certain areas. There's a few areas of polish that would be nice (proper layering, not being able to place pots next to each other because you auto possess the other one, main character can sometimes have 0 hearts, pot attacks can be finicky, etc.) but overall I think there's a lot of potential here. There's not too much in the way of puzzles, feels more like a zelda type puzzle than a true puzzle game, and i don't think it needed any complex puzzles necessarily but the action is not super involved. I remember a lot of the fun of Space Station silicon valley was starting the game with a dead rat, then using that to attack a bigger animal and then using that animal to attack an even bigger one, and then just keep getting bigger until you're a polar bear with rocket arms.
Anyway, not saying you need to recreate an old game, but I think that would help with the hook of the game if you were looking for more of a direction to go and some brain storming. I love the possession mechanic and the art, music and menus in the game are a joy. Great job!