Okay interesting, I played again and actually got to the final score screen, with like 8900 points this time. I used all the tools as I unlocked them and saw way more stuff. I saw the frame, symmetry, flip, etc but I didn't see the darkness one at all this time. I only ran into a couple of the same prompts as the first time too, though they started repeating at the end. Neat that you can play several times and have different experiences.