I liked the puzzles, they pretty neat, but please, don't make pixel-perfect jumps and so damn dark levels. Pixel-perfect jumps gain you zero gameplay value, and when player has to walkthrough your level by memory it isn't very good also. Like add a little dim light aura to character, or to mouse, or to both. As well as shader can be centered around character or mouse, so it is very cool and beautiful and glitchy and grim somewhere at screen borders but you still can see shit where you need it.
I wasn't planned to advertise myself but i don't have many other examples - my game is also dark and grim and noire, but players wouldn't see it in total darkness, right? So i added light both to characters and cursor pointer. It didn't hurt nor damaged the tone. You can check it yourself
Also game "Bite Mark!" has two lights an it is platformer like yours can check it out too