Is there any place where I can see the game mechanics by the inside? I mena the stats the numbers involved , the equations ? is the system based on if you really hit the enemy with the pointer or is more like %even if you seem to have hit or the like?

No one knows?

The CK isn't even out yet, so no one really knows a lot.

Also it takes longer than an hour usually.

Here's what I know:

Spells, arrows and melee hits will always hit, there's no % based on skills. Spell effects may be resisted based on enemy types and effects (Frenzy against undead = no deal).

Increasing game difficulty makes enemies do more damage to the player, and the player do less damage to enemies, and affects nothing else.

Archery has quite a bit of auto aim. Arrows adjust their arc height based on the distance to the target you are aiming at, and will track slightly to the side.

You can see an enemy's health, etc. by opening console, clicking on it and typing getav health. This also works with stamina, magicka, skills and a few other values.

In Oblivion, most enemies did not use magicka or stamina when casting spells or power attacking, so poisons were largely useless unless they damaged health. I am unsure if this is still the case in Skyrim. Try using setav magicka 0 on a spellcaster enemy and see if they can still attack.

The player's base values for regenerating health, magicka and stamina over time are 0.7, 3 and 5, respectively. To view them, type player.getav healrate (or magickarate or staminarate). To set them to something else, use modav. For example, player.modav healrate -0.7 will set the player's heal rate to 0, which you really should do. Do not use setav, as this will reset them to their defaults when you load a save.