Only chance to buy a physical copy of the game (unless you want to pay insane prices within a month or two of the UMD release), otherwise it'll be $24.99 on PSN. The physical copy will be $36.99 and will include shipping and come with a download voucher for the game on PSN in case you don't want to open your copy and keep it factory sealed new.
The kickstarter failed, but they garnered enough interest to get it released here. Then they did a preorder tally to see how many people would be interested in ordering. The goal was 2,500 people (they got 3,000) so they are only expecting to sell at most that many. There will be no reprints or another chance to get a new copy from the publisher.
Original kickstarter backers get a special cover, but everyone else gets this one: