For an app that displays a closed question on a smartphone and lets the user pick her answer within a time limit what would be more enjoyable for the user?
Q1. The user can keep changing her mind until the time is up?
VS. The user picks an answer and is kindly asked to wait until the quiz ends.
Q2. Have two different pages - one for before you pick an answer and one for after?
vs. or would it be enough to keep the same page and just add *you picked answer x"
3.With the smartphone screen being small, would it be better to display the question and all answers in the same screen with the regular html zoom in and scroll mechanism?
vs. having two navigation arrows on (the right and left) to navigate and select answers.
Any other advice and enlightening observation is welcome.