Thank you for this very well written feedback, which indeed allows me to understand the feelings of a player. So know that indeed I had a lot of remarks on the font, in particular that it is hard to read so this will be changed for sure.
As for the UI in general for the non-combat menus (excluding dialogues), although it seems satisfactory from the feedback I have, I will redesign it for better ergonomics, in particular for the character sheets and the bestiaries which afterwards I do not find optimized or even pleasant.
As for the beginning, which disturbed you because there was no combat, the part completely in the dark is an introduction to what happened before arriving on the battlefield. Once on the battlefield, I could indeed guide the player more on the fact that his goal is to reach the abyss as quickly as possible and slip 1 or 2 fights along the way which will be the tutorial, the arch demon remaining the Boss;)
When you talk about the npc I assume it is the instructor who is indeed not mandatory but gives a lot of information in one block. In view of your feedback on this subject, I will present it in the long term probably differently, notably with images a bit like some MMOs which explain the skills in this way =)
In any case, a lot of updates are planned during this month, you can follow them from the community tab of the game in which I post the updates made + short-term road maps;)