Hi
MY name is Oliver. Me and some friends of mine created a riddle game called Dot Riddle. It's a browser-based game where the objective is to pass to the next screen of the site using the clues you find in that screen (something similar to Notpron). Different from Notpron, it has some new features (you can save your progress, registration with very few information asked and a trial to see the first levels. Everything on the site is FREE, of course).
The site is
http://www.dotriddle.com
Any doubts just send an e-mail to
dot.riddle@gmail.com
Hope you guys enjoy the game!