Thank you for your feedback, much appreciated. 

• Agreed the UI was a bit rushed and will need some love  and attention :))
• Regarding the difficult of differentiating the light sources, I will keep that in mind. I will try to experiment more with them to find a way to better distinguish them. Will look maybe to try color tints and/or directional dmg indicators.
• Dark black goop? could you offer some more context about this, as I am not really sure to what you are referring? I can assume that it might be do to the lighting and how I draw the lights. The lights are draw in by shapes and are dependent on the form. I observed that when the shape is concave it generates some really dark areas, and in this case I do need to update my drawing method to minimize or eliminate those dark spots.
• The invisible colliders, are indeed a bug created by the way I do the dmg handling. It seems that while in a damaged state the player can interact with all the layers of the levels. In this case it was hitting a wall that was 1 level down while he was damaged. Will work and fix this :D
• Regarding Lvl3, there were no extra levers/plates to be found it was the first room where it was more of a puzzle. It was a combination lock type puzzle (although it has 2 valid combinations instead of 1, functional bug XD). Intended solution was to flip the 3 levers whit a candle above them.
  • I agree that the levers blends to much with the ground/environment, I will plan to update their appearance.
  • As I wanted to have some more puzzle like solutions to some rooms I considered that a counter of levers to be found was not appropriated as some solution might be more dependent on an activation order, or combination of levers.
  • Could add maybe a hint button or have some more rooms to ease in on the more puzzle like rooms. Would love some more feedback on this if possible. :D

Thank you for your feedback, much appreciated. 

As for the player and objects getting stuck it is because of the unity tile sets. It was my first time using tile sets/tile pallets in unity.

 As far as i observed the object/player gets stuck between 2 adjacent tiles. There might be some option that might improve this collision or i might need to round up the corners of the collision boxes that interact with the tile sets.

Yes, indeed i overlooked the fact that i used the same tag on the prowler as on the player as i needed them to do so. But will be an easy fix :D

I am glad that the game it is fun and enjoyable. xD

As for the light and hitbox effect it was done using raytracing. Unity provides a custom Light2D and a Poligon2D collider, that can be free formed to take any shape you like based on a array of points. I basically used unity raytracing to draw the needed shape every frame based on the ray collision.

Here is the video tutorial that i used as a reference:  Field of View Effect in Unity (Line of Sight, View Cone) by Code Monkey