Get those medals fixed!
The Final Curtain and Spice of Life medals appear to be broken for me, as I've killed 10+ people a few times (and I see that a few other people who claim to have killed 10+ people don't have the medal) and possessed/used every single item in the house in each play through in hopes of getting those medals. The game gets less fun as I replay it whenever I don't achieve anything after talking half an hour or so to do everything.
Really cute game though and I like how the possessing objects get more and more neat and spooky as the floaty feller gains more spiritual clout~ Or, as spooky as it gets for a cute game like this! My favorite items to possess are the beds, the birdcage, bathtub, and mirror.
As for the ghost... The cooing "boo" is the absolute cutest "boo" I've ever heard. The flowy tail effect is neat too~ My friend wishes he knew how to make it!