In-game codex: You're totally right! It's often quite difficult to start in such games, especially if it doesn't have an introduction. I probably will either release a full guided explanation closer to the release, or add a whole codex somewhere in the game
About equipment: sure, i made several changes today, let me know if it's better now
PvP in tower: it is indeed a very subjective aspect. For some, it adds reason to become stronger, for others, it only disturbs... Therefore, I will introduce some ways of minimising the possibilities of PvP for players that do not want that (f.e. passive skill that hides your presence from other players).
And still, it will be quite 'fair', you will be able to meet only players in 10% floor difference from you(so if you're on floor 20, then your possible opponent spread is 18-22 floors). Also, if you're acting friendly, there's a possibility to simply 'ignore' the found player, which is also a kinda funny moment for the game, since players in chat might mention seeing you and letting go :D