Fair enough! My experience was just that the gameplay overall felt too slow and constrained, and I don't think allowing the light and attack abilities to be used simultaneously would erase all need for planning how to approach enemies - you'd still need to be smart about where you're aiming and what you're hitting with the attack. I don't think being limited to one at a time adds much to the challenge, but I may be in the minority and I can totally understand the concern about making it too easy.
I think the bottom line for me is that I'd love to see more of the challenge come from timing and reaction and less from constraining the player - i.e. lean more towards skill based gameplay like sirdorius said. I think a potentially fun combination would be a faster base movement speed with a speed penalty while you're using the light.
Regardless of my personal take on all of that, I know you did what you were able to in the time you had and I would love to give it another go after the voting if you update it :)