The concept is cool but the game is very hard and frustrating, but with some minor improvements and new mechanics I think this game would be amazing.

But also I think you didn't follow the limitation, you used more than 4 colors and shades, but that's probably fine.

The idea of the game is interesting but having the batteries needed to beat the game be the same for the flashlight makes it very frustrating because it feels like Im not progressing and just wasted time every time a battery is used automatically.
If you want to use the battery for the generator and the flashlight, adding a reload button would be good to make the player choose between seeing further or keeping the battery for the goal.

fun concept but it is very hard, Good luck the next time

Interesting game but it could be executed better, the batteries are quite hard to find because you can’t really see them. I also think the flashlight uses up battery too fast to the point where it runs out before you can find any batteries. I feel like if you spent more time polishing the game, it could be a fun game.

I feel like the batteries you need to complete the game and the batteries you need to win should be separate, or, at least, make the torch using up batteries extremely slow. It's extremely difficult to win since you're constantly using up batteries to find more batteries.

It's also impossible to see the batteries since they're very small and dark, which means there's no way you can just find them lying around. The batteries need a small glow effect, I feel.

Not helping is that the environment is very samey, which makes it very hard to make a mental map of the area.  The torch also isn't very good, making it even harder. I know the point is that you can't see that far, but it's so small I had to resort to just spinning it around the screen to see where I'm going, it should be a little larger.

The monster can also just randomly spawn where you're not looking. and kill you, which is never fun or fair.

The concept's alright, but it definitely needs a lot more polish to be fun.