I don't wanna repeat but i believe the stuff what others said is right. While the theme is there for the main idea of the game, it could have been played around a bit via as one other comment said, reflections. in my opinion, instead of a tutorial or hint system. try building an environment that would subtly tell the player instead. let the world of the game guide the player (and in this case of the theme, the one that would also lie to the player) it doesn't have to be overly detailed or anything but its the little details that count. gameplay wise and progression, its straightforward once you figured it out and side from that minor section (like the mirror thing) its good
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Thankyuuu for the suggestion and i think you are right, environment plays a vital role and i looked over it, i should have explored on how a game would be engaging and intuitive but i was so focused on making the game feel like something i had in mind, i forgot to notice the subtle that are louder than they seem T-T. Btw your game is soo good man, i got to learn a thing or two from your game, so polished, loved it.