Hi, please try adding timeline event to pause the animation first, then if some action happens, such as click action, then the animation can be triggered to run.
Here is an example,
1. Add keyframe animations
2. Move the playhead back to 0, then add Timeline event (please click the diamond shape+plus sign icon)
3. Double-click the event marker (half diamond shape at 0), then add event. (Timeline>Pause>page1)
4. This will pause the animation at first
5. Add a tap area component to click.
6. Right-click the tap area component and add event. (Tap Area>Touch/Click>Timeline>Play>
7. If you like the tap area to toggle play/pause, select togglePlay instead of Play
This way, when you click/touch the tap area, the animation plays, but when the ad starts, the animation should be paused.
Please try and see if that helps,
Thanks,
Mariko - Google Web Designer team