The game at the initial speed is alright, but I tend to make a lot of mistakes from just dropping attention. But once the speed picks up, it becomes way more engaging and fun! Replaying the game felt like "getting through" the first two minutes, where you do have to focus, but you're not very engaged, before getting to the good part in the loops afterwards where the game really challenges you. Thus, I wish the speed increase rate was faster, or maybe at least that the first "loop" was shorter?
Also, I would have just quit without understanding you're not supposed to kill humans if not for that one other comment.
Fun game, good work!