The idea is not bad, music and sound effects are nice, and the movement feels good.
The possessing feels kind of inconsistent, I'm not sure if it was because i need to be closer or aim at the thing, would be great to have a crosshair, or highlight the object so that the player get some feedback. The shooting doesn't feel very good because I can see the AIs are able to shoot while walking and when the player shoots it gets locked in place for a short while, feels like the AI is cheating :p