anzes

I’ve actully managed to solve the problem. It’s probably a horrible way to do it as I’m quite new to programming, but it works, and so far I’ve had no problems with it. I hope U’ll find it helpful.
First, U’ll want to open your plugins folder, go to wp-pro-quiz, lib, view and open the WpProQuiz_View_FrontQuiz.php file.

U’ll have to find the start button – just search the file for Start quiz string.
U’ll want to add onclick event:
onclick="$('ol.wpProQuiz_list li').hide().slice(0, 245).show(); $('ol.wpProQuiz_list div').hide().slice(0, 263).show(); $( '#level2' ).show();$( '#finish' ).hide();"
What this does is basically hide the whole list of answers and question and then shows first 245 items – in my case that was the first 25 questions, your numbers will probably vary and U’ll probably have to give it a couple of tries to catch the right number. The same goes for number of Div’s u’d like to show – I’ve been using some divs in questions and answers – if you don’t, your number will probably be a lot lower. As for the end of the code, we’ll hide the finish quiz button and show the level 2 button – the button that will display questions on level 2.
Further on, just below the Finish test button in the same file, I’ve added

<div style"margin-top:200px;"  style="display:none;" class="button" id="level2" onclick="$('ol.wpProQuiz_list li').slice(0, 515).show(); $('ol.wpProQuiz_list div').slice(0, 529).show();$( '#level3' ).show();$( '#level2' ).hide();">Continue to level 2</div>
            				   				  <div style"margin-top:200px;"  style="display:none;" id="level3" class="button" onclick="$('ol.wpProQuiz_list li').slice(0, 788).show(); $('ol.wpProQuiz_list div').slice(0, 805).show();$( '#level4' ).show();$( '#level3' ).hide();">Continue to level 3</div>
                       				   				  <div style"margin-top:200px;"  style="display:none;" id="level4" class="button" onclick="$('ol.wpProQuiz_list li').slice(0, 1400).show(); $('ol.wpProQuiz_list div').slice(0, 1400).show();$( '#finish' ).show();$( '#level4' ).hide();">Continue to level 4</div>

This adds three aditional buttons – the one to go to level 2, level 3 and level 4 – I havent hidden the questions from previous level so the user can still check them if they’d like. The principle is the same – find the number of list items and divs you’d like to show for each category/level. We’re also hiding/showing the buttons accordingly.

That’s about it. Not an elegant solution at all, but a working one :). You can see a working example at
http://www.delavec.si/sterling/english-test/?lang=en

Hope this helps, for as long as functionality like this is not added to the plugin itself.

Cheers