The concept of light being a resource was interesting since it restricts your vision, but it feels like you just can't afford to use it. I wouldn't dash, and would only shoot when I'm right in front of an enemy to get glow back on kill. The melee just didn't work most of the time, but this was probably for the best because then there's no need to shoot and actually consume glow.
It was fun to play through all the levels. If the characters had different abilities it would add a lot of replay value. Reminds me of Nuclear Throne.