That was cool! There's a lot of awkward sprite clipping, but the art is otherwise proficient and the character design is charming; I especially like the construction of the ghost! The soundtrack is basic, but competent, with a solid understanding of building on musical themes.
The only bug I encountered was the sprite-static bug. However, I was still able to walk into the other room and back, fixing the issue.
As it stands, it is a competent mini-adventure game prototype that, although lacking in proper resolution, does clearly outline two achievable goals that function intuitively: I was able to put out the fire and destroy all the smiling boxes! It demonstrates the potential for the possession mechanic. As far as unfinished prototypes go, this is one of the best I have played so far!
Great work! Congratulations on the submission!