We just released the long-awaited Fitznik 2 today. Here's the link to check it out and download the free demo:
http://www.dexterity.com/fitznik-2/

This is definitely one of the most mentally challenging logic puzzle games you'll ever play. Whereas some puzzle games have levels that are simple enough to be solved in just a few minutes, Fitznik 2's gameplay is much deeper and more involved. Typically it takes me a good 30 minutes to solve a typical level from Fitznik 2, and passing even just one or two levels at a time is a very satisfying experience.

So if you're up for giving your brain a real workout, give Fitznik 2 a try. You can play the first 10 levels for free.

It is great to know that there is Fitznik 2
A small comment: In the first level there is one Boulder that is not needed. I think you should take it out.

Gali

Several levels (especially the early ones) have extra boulders.