Cruz has been under development since late 2010. This demo allows you to play the original 8 Kroz games, including Kingdom I and II, Caverns, Dungeons, Return, Temple, Final Crusade, and Lost Adventures. It also features a 32-level demo of a brand-new adventure, The Underground Empire of Cruz.
To date, there have been two Kroz ports to Flash: a simple port of Kingdom II and a brief adventure of 18 new levels. I was very disappointed because they didn't have much new content, had many flaws (like running too fast), and most importantly, did not support the best of the original Kroz games.
This demo has a LOT of content--over 250 levels. You will need to use the game's save feature to complete it all, especially Lost Adventures!
Enhancements to the original Kroz series include better graphics, animation, and a complete soundtrack (Kroz did not have a soundtrack).