Fortunately, I don't have epilepsy, but the flickering made me nauseous...
Another drawback is the lack of highlighting menu items when hovering and (possibly) a bug at the end of the game: there you probably need to press a button, but the cursor didn't appear.
Gameplay... well, here my assessment will be somewhere in the middle between the previous commentators: the slowdown was really annoying, but at the same time it made you think. It's not good and not bad. It's just there and adds originality to the game.
I liked the secret (found 1).
The story is good. And the language barrier is bad. Unfortunately, I can't fully evaluate this aspect of the game.