Hey folks sorry for the delay on this.
So the Hype Bric currently offers 4 triggers. On Load, On Screen, Scroll Sync and Scroll Sync (Fast). I have also started working on a new feature that will lock the browser view from scrolling so the Hype animation is animated frame by frame with the mouse scroll and once the animation is complete, the page will resume normal scrolling. I appreciate this also doesn't help but thought its worth mentioning in case any other Hype users would find it helpful/interesting to know its in the works.
As @emcee advised, if you want the user to control playback, set that up that in the Hype project setup.
Finally, Blocs 4 is an unlimited trial, it never runs out, it has one major limitation, you cant export. So for testing or just messing around @MaxZieb you should be good to go