Thanks for showing us!
My first impression is, "Wow, that takes me back." It's got a very retro feel to it -- it reminds me of reading DragonQuest more than any other game I can think of just now. Except that it's streamlined: DragonQuest had lots of big numbers (based on d100, and with D&D-ish 1000's of experience points to get to second level if I remember properly), and Elthos uses a much tidier scale of 1-6 for everything.
And other classic games. It seems to have a structural resemblance to Mazes and Minotaurs (http://mazesandminotaurs.free.fr/
), which IIRC was also based on a scale of 1-6 in many places. Elthos is purer about its 1-6-ishness, though.
I'm a bit confused about advancement though (for one thing at random). On page 11: if a character uses an elective skill, he gets SLP x DL experience points. DL's will often be about 3-4, and SLP ranges from 1 (Reading and Writing, Swimming) to 3 (Stealth, Horse Riding). So, riding a horse successfully will give you, oh, let's say it's dead simple with DL=1, so 3 exp. Also from page 11: thieves are 4th level when they have 20-39 exp. So, um, can I get my thief to 4th level by seven successful horseback rides (7x3 = 21 exp)? Or, more interestingly, two successful attempts to sneak around in middle-difficulty circumstances (DL=4, so 12 exp each)?
I'm rather pissy at the moment for reasons that have nothing to do with Elthos, or even gaming. I have to save at -3 against ripping into it ... *clatter* Made it, but just barely. But if you want a harsh but well-meaning critique, I'd be glad to give one.