yesterday..i (actually with my friend aditya) i was able to complete all 62 available levels of Orio's riddle. The objective is to advance and get to the next screen. Aftre each level you have to find url for next level..it was fun solving them...various techniques while solving these puzzles require exif info from images, anagrams, decryping various codes, source code of webpages and help of wikipedia, google. you can get started here. Also you can disscuss puzzles at forum.