Question: Does it also say “0” when enemies miss you? Or “0” only displays when they hit, but they deal no damage?
0 is a missed blow, the minimum damage is 1 even with a DMG reduction of 10
Question/Suggestion: Are some enemies capable of hiding? Sometimes I see rats coming out of nowhere, and once I thought a goblin suddenly became visible, but it’s impossible to determine if they came from another room or corridor.
No, but some enemies (like rats) can reproduce themselves, so you can see a new enemy appears next to another of the same kind.
Question: is it the same to perform the search action with 1 ap remaining or 10 ap remaining?
yes
Bug: when entering a room by diggin a Wall through a neighboring room, the line of sight mechanic doesn’t work and you can only see 1 tile into the room.
It's not a bug, it's intended in this way. If you are in a tunnel in a wall, you can't properly see around you. It's a little disadvantage to not use the main door ;)
Thank you again, i'm going to publish a new update soon