Might be easier to debug with some raw javascript:
loadScript("../../../scripts/review-level-" + ig.game.currentLevel.toString()
+ ".js", function() { reviewFunc(); });
function loadScript(src, callback)
{
var s, r;
r = false;
s = document.createElement('script');
s.type = 'text/javascript';
s.src = src;
s.onload = s.onreadystatechange = function() {
if ( !r && (!this.readyState || this.readyState == 'complete') )
{
r = true;
callback();
}
};
document.body.appendChild(s);
}
EDIT
Solution was found here.