Ok, so i've been running about with all the crystals and key cards. is there an end state to this game?
Your game fits very well with the theme and the mechanics do what they're meant to do. Quite eeries atmosphere, and honestly i don't do well with horror games XD. Happy to find out there were no monsters.
The parallel world is a bit laggy on webGL, but that's nothing to do with your game in itself.