Perhaps audio stutter could be hyperPad's fault, but something not triggering (e.g. object touched) is very often the user's fault and it's easy to give up and blame HyperPad.
Where the logic is not triggering, add a clear message to indicate the behaviour has been triggered. If that doesn't show, reselect the object.
If you still can't fix the issue, we can't help unless you give us your project and maybe I can find the issue,