Here's a little bit of feedback:
+ The graphics are super polished. Great work!
+ The touch interaction could use some work. Sometimes, I drag and I feel it colors squares that I don't want to color. Or it colors squares that I've successfully colored already, and it's not clear how I can backtrack. Take a look at path drawing games like Scramble with Friends to see how they handle backtracking.
+ I understand that advertisements are ugly and you want to keep your game very slick and polished, but... you are leaving a lot of money on the table. I would make your app a Universal Binary (add iPad support) and then throw an iAds/AdMob banner ad at the bottom of the screen. Then, make it very clear that if the user buys an IAP, that you'll remove ads forever. You can keep your iPhone version ad-free.
+ Why isn't your app just called "Adrift"? Was it taken already? "Adrift by Tack" looks a little clumsy, or err... tacky.
+ From appstorerankings.net, it looks like your keywords are "3d cube connect center adrift by tack". Center comes from Game Center, and Adrift by Tack comes from your title. So it looks like you don't use many keywords. As a new app on the store, I'd add more keywords like: puzzle, flow, board, etc. And try to find more unique ones where you might rank highly.
+ Good luck working the press! You've already done a great job with HN. :-)
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