I will not buy the second part.
Bought the first one and found it really interesting and original, but the "sequel" is just another update, so it should be, at least, free for the people who OWN the game.
I will not support a creator who can (and will) create a "sequel" every 15 in-game days and make me pay more for the game I've already bought.
As other commenters said, it's not the price, it's the principle.