Ive finished it now as well. I was expecting it to be something extreme. But well, it took me about 25 minutes for the first time. The only level that really took me a lot of tries was the last level, but it wasn't either anything extreme. Of course I still prefer extreme Spaz-tests over some extreme Jazz-tests with wind or sth, Yaxish test being my favourite of course.

EDIT: This either doesn't have a lot of replay-value I guess. I replayed it within 11 minutes or so, now that I got used to the levels and stuff.