I got all the way to the end, and I've got to say the environment and aesthetic is incredibly polished! You can tell the entire map is oozing with attention to detail. I only have one nitpick on the visuals, which is to say some of the doors (i think only facing one direction) are darker, and a bit easy to miss. The doors in general are a bit hard to distinguish from the environment, so it would be a good idea to give them something to make them pop out a bit.
Otherwise gameplay wise, The enemy respawn seems to be very quick. I have to assume this is to counteract the unlimited heal pyramids, which I would suggest one of two solutions for: have the pyramid be on a countdown between heals during which you cannot use it instead, or if you want to be harsher, have them only give out a finite amount of heals.
Regardless, I enjoyed my time with this game very much!