Do the different characters in Temple Run affect gameplay

Here is how to find out approximately what your score might be:

If you were to run a certain distance without getting any coins your score (S) would equal your distance (d) times your multiplier (m): S = m × d.

But when you add coins, your score is the multiplier times the distance times the amount of coins (c) divided by 1000: S = m × d × c / 1000.

(This may be off by 1000 points.)

The resurrect utility is activated by double tapping (that is, tapping twice, not once with two fingers) anywhere on the screen at any time.

After it's been activated, it'll only last for 30 seconds, after which, if you haven't died, it will disappear and be wasted.