This was a very interesting reaction based/identification style game. Especially figuring out the control scheme and what parts would actually change, which was quite a lot of them. Especially on the higher difficulties where there were definitely a lot more bits moving relatively close to the original.
Which obviously increased the difficulty quite a lot since there were less blatant differences, Especially since my first assumption was that the difficulty would mainly just be with the timer. Rather than the actual image itself changing less and less. At least, that's what it felt like, I could be wrong, it did also feel like there was a time change as well, which makes sense.
One bit of feedback I would say is that maybe a bit of a delay on the audio cues for whether you were correct or not could be delayed. It might add to a bit of suspense, although it could always change basically nothing. I'm not entirely sure to be honest, but just a suggestion.
Overall though this was an interesting setup, and honestly reminded me quite a lot of shows I've seen before where a similar situation occurred, specifically an episode of Martin Mystery. As well as I believe a story I've heard where something similar happened. Gameplay wise though, it definitely was quite rewarding to get one correct, and quite stressful to try and avoid it, at least for me personally. I do feel like, maybe a bit more feedback on either, mainly on success, could be helpful. Though I'm it quite sure what that would be to be honest.