Yeah, I didn't solve it, someone helped me because I just don't get it... Me and my friend are still puzzeling with the riddle and we think we got all the clues though we don't know what to do with the X and Y and we also don't know what to do with the letters on the stones. We searched on for hours trying different things but it's so hard. We than think we know it but when we try it out it doesn't make any sence... Can you please help us a bit? How to solve it? In a note ofcourse. Though we have much fun with it! With trying out the signlanguege. We sometimes end up with different things or confuse signs with eachother, but that's still much fun. Though, the signs are a bit useless for us since we don't know any deaf people, and we live in The Netherlands, but I think it isn't that different from eachother.
I have one question though, can I mabey put up a link to the game and credit to you on my page? I really want people to see this, it's much better than all other games you can find online.
American Sign Language actually came from French Sign Language in the early 19th Century, and it's similar to the French and German sign languages, so maybe some of the signs could be useful to you in the future.