Plus Abyss: Wraiths of Eden (entertaining Bioshock knockoff turned hidden object adventure), Riptide 2 (pleasant, if bland jetski arcade racing), Quell Memento (decent casual puzzler) and Threes, for anyone who doesn’t already have it. The apps on offer aren’t bad either. Autodesk Sketch (if you’ve got an Android tablet, anyway) and Office Suite might be worth snapping up for some people here.
I feel kind of sorry for Amazon, to be honest - they’ve been giving away a very creditable string of freebies and credit towards still more games and such, but their app store’s still awful and it’s still tied to a branch of the main Android ecosystem that’s all but struggling to breathe. I doubt the Kindle’s going anywhere in a hurry, but I don’t think throwing free stuff at people is automatically going to make it better in the ways that count either.