Abraham's link is an example of side-scrolling if that will do.
But Temple Run(tm) involves scene perspective and zooming in 3 dimensions which is different.
I would also be interested to know how to do that in App Inventor.
One way might be to separate an animated scene into 15 frames for each second and play it back similar to
> this < technique.
You might overlay the character ImageSprite on that scene which would be the Canavas BackgroundImage which is cycling 15 background images every second.
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Scott