Setting up the Kickstarter for a longer period wouldn't have made a difference because crowd funding is typically front loaded. They get most donations in the beginning. If you're not close to meeting your goal in the first week, you're mostly likely not getting your project funded. Didn't the Veronica Mars movie get funded in like 37 seconds? If people want something enough, the creators won't need very long to fund it.
And I paid attention to the reward system. $5 got you the first episode, $25 got you six episodes, and $50 or more got you all 12. My issue isn't with what the rewards they say you get. Precursor Games was having trouble funding the first episode. Their intention is to complete all 12 episodes. I don't recall reading a plan for what happens if they can't fund additional episodes. What happens to all the people who pledged $25 or more? Do they just get a prorated refund? Not exactly reassuring. I would never pay for more than one episode if I were to pay anything at all.
More importantly, I'm not interested in episodic games so I would never fund or buy one episode at a time. I want the whole game (assuming, of course, it didn't get crushed through terrible word of mouth) because I like playing games through to the end. With Shadow of the Eternals, there's no assurance other than their word that the game would ever be seen to completion. No thanks.