But why do I have to kill the kittens? :(
I think the basic mechanics are solid, but it needs polish. For example, it took me a while to figure out I can upgrade my buildings, and then the upgraded versions and their effects are not clearly visible.
The loop theme didn't really work for me because I got to the end on the first run, but otherwise, I don't think I would remember or really consider too much of the timeline of events. I do like the concept though. I think I would consider some changes to the events: make them more impactful, so it's worth remembering them, and maybe provide some way to gradually save some of the timeline as a kind of reward so the player doesn't have to keep track of every single event.
The graphics don't really match, there's different scales of pixel art and then the hand-drawn parts, although individually I think it's fine.