It may not be close to Halloween, but R.I.P will put you in the spirit. While this new game is light on depth, it does a nice job at killing a few minutes of time.
The premise is pretty simple. You are a ghost trying to make your way back to your happy little home amongst the dead. Using both touch and tilt movements you must find a grave marked "R.I.P." in the quickest time possible. The game then records the time and keeps a list of the best ones. Unfortunately there are no levels to pass or different types of terrain - so improving your score is the main challenge you will face.