I like how you can escape even before damaging the core. It makes you miss some game-completion and some valuable story element, but it's a fun little easter egg.
I am totally stuck at 31/32. Every available pixel is either a couple millimeters away from my grasp or just requires an awkward jump I'm unable to get for some reason. I have checked and double-checked every part of the map I can get to, and no pixels seem possible to get...