There's also the FAQ here with a lot of basics explained => http://www.managames.com/DungeonGuardians/faq-troubleshooting/ .

@bler144, The Assassin & the Duelist are both more technical than the Man At Arms & the Protector, so I'm not sure they could be seen as more casual... :) It feels very nice to see someone getting & explaining the game well !

And to answer your post here : https://www.gog.com/forum/general/games_finished_in_2018/post337
Putting the map in different places according to an option is an interesting idea, I'll keep it in mind when I desgin new levels.
For the Level 3, the map is actually relatively close to the level start ; you might have missed it, as it can be hard to notice it ; plus it greatly depends on the way you explore, as this level is non-linear.

@amok, All timed puzzles are optional to get extra gear, with 1 exception at the start of the game, but it's a super slow & basic one.
There are also a few traps, but as bler144 said, you can temporarily lower the difficulty to lower the damage if it gets really too annoying.

Last thing, a tip : you can pause during the puzzle if you need to check your bearings..! :)

@Leroux,
the normal Mobs shouldn't feel as HP sponges, so maybe you don't use correctly your abilities, but more likely it's because you feel there are just too many of them ; in that case, you're not the only one and this complaint came very regularly, so in addition of the customizable HP percentages that you have already noticed, and like bler144 said, I added the "Low Enemy Density" option in Game Options. :-)

@Niggles,
Once you're in-game, it doesn't feel much like LoG : the camera is significantly different, the GUI is very different, even the movement & controls feel different (it's more like a classic 3D FPS).

@Crosmando,
Actually, it's because I greatly enjoyed the mossy environment of LoG1 and wanted my own version of it. But as I'm not an art director, I failed to see the produced result would give a global feeling too close of LoG's one. More details here => http://www.managames.com/DungeonGuardians/2015/10/06/5-grimrock/ .

Yes, I'm mostly referring to the bosses, the mobs are not that bad but still take a bit too much time to defeat for my personal taste, but I guess part of that is also due to what bler144 explained: at least with the limited abilities you have in the beginning, it quickly feels like you're doing the same moves over and over again, without much tactics involved. And tougher tactical combat isn't what I expect from games like these anyways, for me the combat is secondary to exploration and puzzle solving, just to add an element of danger and excitement and put some cool, creepy creatures in the game, not to keep me busy with repetitive menu-based clicking for minutes. But that's just my personal preference, maybe this part of the game just isn't for me, or maybe I'll come to like it better later on. In any case it's very cool that you can reduce the number of enemies and their hitpoints, so that everyone can decide for themselves how much combat they want in their playthrough and at what diffculty.