I don't think the Timeline panel shows up completely. So far I see only one pausing point on the Pause button at around 27secs.This means that the playhead will be paused at that moment when it gets to that frame. But if the learner clicks the Play button when the playhead is paused at 27 secs, the pause will be overridden of course.
Where are the interactions you were talking about? I don't see any interaction, you have only some common navigation buttons, a Play button, a Pause button and a Replay button. The last is the only one triggering an advanced action (not an interaction, try using correct terminology). I can suspect what that action is, probably as described in my blog post:
https://blog.lilybiri.com/replay-or-reset-slide
The Help nor the Resource button trigger any action at all. Not sure what they are doing at all.
I don't understand your last question. If this is about the Play button, it has Infinite attempts which means that it doesn't have a Last Attempt event which could trigger an (advanced/shared) action when attempts for failure are exhausted.