I have some constructive criticism.
It's too easy to get lost, maybe if you changed the color of textures in different areas of the map so it wouldn't look all so samey it could be easier to tell that your in a new area of the map.
The camera is very slow. I found it hard to control. The one thing that stopped me from turning around was the size of my display. When I wanted to turn the camera a full 180 degrees, the one thing that stopped me was the mouse hitting the edge of my display.
The extra variables don't feel like there adding anything. I bought seven light upgrades and I still didn't feel like I could see any further than I first started. When you progress to grow stronger, the changes need to feel immediate, and I just didn't feel it.
I am sad to say that I quit playing halfway through the game. I actually gave the game two attempts, but if the camera was easier to work with and the progression was there, I probably would have sought to beat it.
I know I sound negative but I sincerely hope in the future that you will become a better game developer and not take the little things for granted.