Itch has been having issues with downloads recently. You can try one of the mirrors on Patreon instead: https://www.patreon.com/posts/v0-1-8-public-93223596
Good to know that it's not just me (I was wondering why a 330 MB download took 3 tries to finish)! If It screws up halfway I'll follow the mirror because a 1.6 G download takes about 90-100 minutes for me to DL and I don't want it quitting halfway! Haven't played since 1.6 so gotta see all the new shenanigans! UGH quit quite early so downloading via GoFile instead.