Fun little concept, I am impressed by the use of something randomly generated. However, I do have some notes for potential improvement.
First of all, at no point in time did I ever use the shield. The turrets were slow enough and didn't predict my movement, so there was nothing they could do if I simply walked in a straight line. Adding upon criticism regarding the turrets, because their bullets were the same colour as the floor, I couldn't really see the bullets that well, which of course is not good.
From there, I mostly just wandered aimlessly until I found the end.
Regardless, as I said anything randomly generated is impressive in my books; I would love to see how it's made. But I think if you wanted the maze to feel at all intimidating, you'd need to improve the threat level of the turrets in a way that forces the use of the shield.
Thanks for creating!