Very well polished! Singularity has a distinct art style, good puzzle design, and fits the theme of "One Time Use." I would enjoy a longer version of this game. The narrative was interesting, and I like that the "win condition" was to push towards the black hole. I don't know why I like that, though XD. I do wish something would have happened when I tried to pull away, even if the point was that it was inescapable.
I also wish that the movement speed was a little faster, even while running, but it wasn't a dealbreaker.
Overall great work! You completed a fun and complete game that fit the theme.