I have a few questions about game. Its my first roguelike game, so dont be strict=)
Hi! I'll answer them as best I can.
There is some sort of crafting in the game? Can my character produce wands, weapons or scrolls?
No. It'd be pretty sweet if there was, though.
When I use harden material scroll how it works? It automatically harden item to next possible step or it determined by Int of character?
Success or failure is entirely determined by your character's intelligence, and there are higher intelligence breakpoints for success depending on what you're trying to turn an item's material into. Harden material scrolls have a hard-coded progression of materials, but their intelligence breakpoints are five points lower than those of change material scrolls (which are free of restriction in that way). As far as reading the wiki goes, if you are, say, trying to determine how much intelligence you need to harden ommel hair, you have to note that it hardens into phoenix feather, then look up the intelligence requirement number for that material (it's not terribly intuitive IMO, but I don't think there's much in the way of a better solution). The materials you can't get with scrolls of harden material have their scroll of change material requirements listed instead.
How density and flexiblity of material affects to item?
General info: For armor, high density equals more weight, and more weight equals higher agility and dexterity penalties; lower density equals lower weight and lower penalties; flexibility is the opposite, but both are big factors in whether you'll have penalties and how bad they'll be. Strength is the factor of choice if you only care about AC, but you won't last long with low agility in the dungeon. As for weapons that aren't a whip, strength is clearly linked to damage, while density probably is as well to a lesser degree, but it does make the weapon heavier and thus have higher AStr requirements to use effectively. Whips, on the other hand, are best with low density and high flexibility materials that are also strong.
There is a command for run?
Press g to 'go'. Very peculiar key choice for a roguelike, but it could be worse.
Articifal limbs is better than "default" ones?
Artificial limbs let you run like the wind and wield weapons heavier than the dungeon itself*, since you're taking those strength, density, and flex modifiers and applying them straight to your stats. They do not naturally heal and their stats do not grow over time like natural limbs, though. Generally speaking, they are good for making up natural stat deficiencies and making you more awesome than you ever could be with 'normal' dungeon experience.
*certain materials may be more equal than others for these purposes