I wont really be talking about everything here since I don't like repeating what other people said. Graphics and sound improved a lot and even the game balance seems more fair than in the previous version.
I played "ToK.20_windows", so there is a good chance you already changed or fixed most of the issue, but I'm going to post them anyway.
First suggestion. It would be nice if you setup some kind of online changelog. Even just for demo days, so people can see what bugs are already reported or fixed.
First is the broken wall bug. As you have said, this probably breaks your save since I couldn't load it after seeing that bug. Autosave for that same level worked fine however. This is a different spot than in the video, but it is the same wall orientation.
There is an ordinary room behind it. I uploaded the save here: https://drive.google.com/file/d/1goKerQChz_W-upbV57p5LY3ihSu-eDM0/view?usp=shari...
As I said, it's broken and can't be loaded.
Another save problem, I loaded level 4 save and this happened:
Couldn't move or do anyhing. ALT+F4, loaded the save again and it worked.
Next list are either small anoyances or minor bugs.
Items can drop behind walls (By the way, the bugged wall is in the red circle since I forgot to put up the automap in the previous screenshot).
Doors are very anoying. It's nice that they open when you walk into them, but you can still close them, which got me hurt quite a lot of times when I wanted to walk and I closed them instead. I would suggest you either remove the ability to close them completely, since enemies can open them no problem, or you make enemies incapable of opening them and they would have to break them down first, so there would be actual purpose to closing them. As they are now, they just cause pain.
It would be nice if I could open the spell book by clicking on the spell slot next to the mana orb.
Clicking doesn't count as a "press any key" on the loading screen.
Can't drink potions from the inventory by right clicking them, even if I enable the "right click to equip" in the options menu. This got me killed in the prison encounter because I wanted to use potions straight from the inventory, but was dropping them instead.
Enemies pop in \ out of existence instantly when they enter \ leave your field of vision. Would be nice if you added some kind quick fade in \ out effect.
Adding impact \ miss sound effects for ranged weapons and probaly footsteps or more idle sounds for enemies.
That's pretty much all I noticed. I didn't play through the entire game this time, since I have to fix my roof, but It's safe thing to say that the game improved a lot since the last time I played. Keep it up.