It has been a month since ChessInvaders was published in the App Store! It has "sold" (for free) more than 6k copies, and has been engaged with (played through at least one level) almost 15k times. The download rate has slowed to about 10 a day, but about double that are playing every day! I'm pretty happy with that given that it's a pretty hard and definitely beta quality game experience.
There have even been some reviews!
Download it here: https://itunes.apple.com/app/chess-invaders/id575380345
People have been discovering some pretty cool bugs along the way: including floating pawns and exploding gui elements! The game turns out to be pretty hard, and especially hard on smaller screens. At the last minute, I added an option to slow the game down (under Settings), and made some tweaks to the spawn rate, but don't be disheartened if you can't beat it — only 32 people have so far.
All in all, I have had some great feedback and have learned a lot! I've started working on the next game, a color mixing puzzle game, which is coming along much faster, after which I hope to revisit ChessInvaders and give it a good reworking to make it more fun!