It’s not the full game, it’s the “First Store” edition/chapter/whatever. The full game has a separate Steam page. So it’s likely yet another demo version.

There aren’t a lot of reviews yet, but so far they are mixed.

Probably like probably most people still do find out nowadays.

In this case, crowd-funding is just a marketing instrument anyway. According to the Kickstarter page, they’re 21 people working on the game, they want to release in 18 months and they need $ 170,000 to do that (which, by the way, they already got). Less than $ 10,000 per month for a team of 21. In other words: They actually have enough money to do it without Kickstarter.

Well, in the world of esoteric candidates, there would be some easy ones, like Brainfuck or Shakespeare, but maybe Whitespace is enough of them in the list.