Woooo this game deserves a 5/5 in Sensory for sure! The enemies, SFX and level design all contributed to some high-quality atmosphere building right here. I like the difficulty curve, and save & load also worked perfectly smoothly even on Web!
One potential issue I think players may run into is that if you save with enemies right nearby, it may cause a softlock where loading constantly gets you killed with no way to escape. I never actually encountered this, but I think it's something to keep in mind. Maybe make the save points be put in "safe rooms" that will despawn the enemies when you enter them?
Overall, awesome work!