I’ve been working on Dink HD to greatly improve it for a new release, you can help test it here! It’s been open sourced (on the RTsoft subversion server) as well so feel free to contribute patches. The plan is to release it free on all platforms soon as I can, until then, it won’t run on iOS 11.
Also a new interview about the making of Dink is here. Talks about its low sales and making games as an indie in general.