It should have coins for adding the score and a countdown timer for it's gaming time.
When the countdown timer goes to zero. The game stops then the stage will remove the game scene then a new layer will pop up with the total score in it.
Maybe this is something you can adapt...
Replaced the graphics with blank images in the fla to make the file smaller, so you will need to re-attach your graphics in the library before you try to run it. Runner.zip
I've done it already.. I already have coins that is adding up the score, and a countdown timer that when it goes to zero the whole game stops.
The one big LAST problem is, when I exported it as a movie(swf) the game is slow..
I also tried it on the phone because this is a android game, when I tried it on the phone the gameplay is kinda slow or lag.
Do you mind if you can check my whole flash file. please send me your e-mail add.