Interesting core concept that is well implemented, but I don't think having the flip happen on a timer makes for good gameplay. It makes the player feel without control and it quickly just gets a little annoying. I would recommend changing it to be based on buttons/areas in the level or a player-based trigger with a cooldown or resource.
The visuals and presentation is great! So much cool art and small details like the particles floating up from the ground or dripping from the platforms. Makes for such a thick atmosphere and creepy vibe. Nice work!