In-game codex. An explanation of how things are supposed to work, like why it's called "Aura". (And maybe also combining some of the Aura skills to differentiate their relative benefit from the others?)

Dropped equipment in a different, brighter font color, to make it more obvious when you've gotten something. I've checked my equipment and wondered "how did that get there?!", as though finding a banana peel in a cupboard.

I like the text-based system; it plays nicely with watching a video in another window without risking a browser crash. The low player load is also nice, and if it were up to me there would only be friendly player encounters in the tower. (I want to wander and loot and gain without having to commit brain power to anything! Life's rough, man... If everyone else wants a PvPing arena then great, but I just want to wander the tower like some reiwa anime protagonist and be a root vegetable.)

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