I liked the game concept!
I wish the player moved faster and there was less distance between points of interest. Travelling multiple screen-lengths of just straight hallway gets boring. Player's ghost power is cool, but seems repetitive to use, since it feels like I'm using it the same way against every enemy. Maybe there should be a cost to this power, and add another way of dealing with enemies that doesn't have this cost to force some variety.
The graphics jitter strangely when I play in Chrome browser.