If you want a more durable version that requires a little more equipment and effort, I also have a sheet of graphics made to fit on standard checkers. Of course, you can easily make your own markers as described below. You'll need two sets, one for each player, in different colors. The creatures' markers are two-sided. One side of the marker shows the creature asleep, and the other shows it attacking.
Capital letters signify the dark pieces and lowercase are the light pieces.
No multiple jumps are allowed. The effects of jumps are listed below. This takes precedence over any other rule. These are not exceptions or additions, just significant consequences of the above movement rules. Flip a coin or find a similar method to determine who goes first.