Web Audio Evaluation Tool

In many situations, it would be useful if subjects could do any number of pages (up until the total number of pages, a specified maximum, or even looped so that pages can be done multiple times, with or without repetitions in the same 'cycle), according to what they want or filling a predetermined time slot.
Recording all data up till when they want to 'end the test prematurely', at which point a 'post-end survey' should be presented.

Would like to keep the whole toolbox simple and not add too many options, but something like this could be merged with earlier requests for a 'panic button' or 'end prematurely' button, so that things are recorded even when connection is broken or subject has to run for a dentist appointment mid-test.