You may want to put a flashing lights warning on the game or game page. The way the light would flicker in certain locations was a bit headache inducing.
I wish there was more contrast between the character and the light. It was difficult to tell where the character was at times because of how closely it matched the light. It was difficult to control the character. The movement felt fast, with low friction, making it feel like you were on ice. The controls were also not very intuitive. I kept wanting to use just the arrow keys or just WASD, and the combination of the two felt odd to me. Using Space for jump could have also worked, with the A and D for left and right movement.
Sometimes it felt like your character would sink into the floor, altering how much light you were emitting and letting you get into tight spaces. Other times it felt like you were slightly floating above the floor, making the light flicker and making it harder to control. I think the character might have been jumping forward and backward, even when I wasn’t pushing any keys, but I couldn’t be certain due to how hard it was to see things.