There are two that stand out to me.
The first is the fact that they made the tiers for rewards so rigid. What I mean by that is you have to slot into a specific tier with no way to add on to that tier. Most of the Kickstarters I've ever done have allowed you to add X amount on top of the tier you've selected to add more items. For example, say you picked the single physical copy but you wanted three copies. In most other Kickstarters, you would just pick the single physical copy tier at $40 and then you would pledge $120 and you'd get three copies. That's not the case here as they had to add on another tier that explicitly states two physical copies. This is limiting. I really wanted the soundtrack, but the soundtrack only comes with one copy. It was a higher priority for me to have two copies, one PS4 and one Switch since they have the exclusive cover, over the soundtrack. So instead of bidding on the higher tier and adding on another $40, I was forced to pick a lower tier. I believe this rigid tier option made them take in a bit less money than they could have got since it wasn't flexible.
The second is not only announcing retail stores, but allowing preorders on them as well already. I think between the lower cost, being able to use discounts or reward certificates, or simply the fact that knowing it should be readily available means there's no hurry allows people to put this off rather than feeling the need to jump in to secure their copy right now.
I think the combination of these two have impacted the total amount the Kickstarter could have pulled in and I think these two could have made the difference of it hitting that $2.25 goal which it could fall short of based on how close we are to the end but how far away we are from the total. It's going to be close though.