It's not a hard game, the objective of every level is actually quite clear.
Its a frustrating game.
The companion AI can be incredibly dumb, its annoying that I have to light every cave in order for them to follow me, they have no sense of the surroundings and most of the times they will hurt themselves at the slight chance they got, most likely for them to make a random bad jump that will ruin the run.
The camera movement is incredibly annoying, when you move to a direction, the camera will slightly move to the direction you are going, but its not smooth at all, so it goes kinda crazy to the point its annoying.
The stealth level just sucks.
The build gun is not very precise and a pain in the ass to use most of the times (at least with a controller, which is what the dev tells you to use).
I get where the dev was going with this game and I can appreciate all the tech behind the game like the destruction system, shadow system, all the animations, etc. But if it was not so much a trial and error type game I would have enjoyed it more, that said, in the two hours I played, the game crashed twice and there where bugs like enemies not resenting properly, so when I enter again on the level, the enemy that killed me stayed there and another one appeared, and killed me again before me reaching the weapon.