I really loved the design of this game; the color palette, art style, and music were all superb. They certainly all had great style!
My biggest criticism is probably the difficulty that comes with juggling so many mechanics simultaneously. Pushing a crate, sneaking around guards, and watching your "light meter" all at once was a little bit overwhelming. It may be helpful to have some kind of auditory indicator whenever a guard is close or your meter is low, that way the player doesn't have to rely only on their eyes for each of these mechanics.
That being said, the challenge that came with these mechanics was really engaging and unique (in a good way lol). I loved the little gameplay discoveries I made during the run, like learning that running away from the guards while keeping close to them kept your meter filled, or that you could lead the guards outside so you could run back inside and gain more time to push as they walked back in. That's a sign of great game design, allowing different strategies to be forged as you play.
All in all, it was an awesome game, and I can tell you put a lot of care into it. Great job!