Well...lambda is solved, and now I know how to solve mu there seems very little point in actually doing it. Not the best level idea, in my opinion. But hey.
I don't like it that much either ... but it was ok. I would have prefered it much more, though, if it hadn't been the last level. I mean, the last level is supposed to be filled with absolutely no clues at all, no pictures, and nothing that would possible be able to help you solve it. That is the perfect last level. And the answer should be: thisoneisimposssiblesoijusttrysomethingtotallyillogical.php
And to make it even harder you will have to spell impossible with three S. This level is way too easy.