Nice game! I love Portal and The Stanley Parable so it really scratched my itch. The dialogue was witty and original, and I really enjoyed it.
A couple bits of feedback:
It always seemed optimal to fully charge the ball throws, so it felt a bit clunky having to wait for the bar to charge every throw. Perhaps removing or quickening the charge time would be nice, although maybe you intended to make levels where the strength of the throw actually matters.
The dialogue for entering the first room made me think of this, but this game might be really hard for colorblind people to play! I understand accessibility features are a bit overscoped for a game jam, but if you ever bring it to a full release it's something you should consider.
Other than that, really nice work on this game!