That was fun! The art is proficient, the character design is charming, and the soundtrack is catchy. It was fun moving around as the ghost and scaring people off.
The lives system is a bit punishing; the levels are quite hard as-is without restarting from the beginning.
The audio balance is a bit off. The music is a very quiet compared to the sound effects, and the sound effects are a bit loud. The camera snap sound, in particular, is much louder than the other sound effects; it often peaked the volume above +0.0 dB!
All-in-all, good work!