Okay, so I figured out how to use the mouse wheel function, and that removed a lot of my frustration when trying to deal with the high-speed incursions at the end of the game, since it allowed me to "rewind" time.
I finally unlocked ending number one, though it seemed some of the voice dialogue didn't fit the written dialogue. And one or two places of the written dialogue conflicted as well, since one part ordered the drone to kneel and then the dialogue wrote that the drone in the ending was rising instead. I won't spoil the ending for those who are also playing, but I thought I should note those minor issues that I discovered when seeing ending 1. If you're looking for a proofreader to double check things matching with the vocals so it all lines up, I don't mind helping out, provided I don't have to edit anything that's graphic.