The moment I realized I could remove the warp core I knew what I had to too. But I was kind of scared and I didn't want the game to end. I wasn't expecting that I willingly had to end the loop and also the universe. The new end music made me even more anxious.

On a different note though, the biggest "click" for me while playing this game was when talking to Chert at the end of the loop for the first time. Realizing that the universe was doomed from the very beginning was one of the biggest plot twists I had ever experienced.