What a lovely puzzle game. Any plans to release on mobile? I would love to pay for this and play it on my phone.
Thanks! :) I released it for Android and iPhone some time ago, but it did not return any money and keeping track of the idiosyncrasies of the app stores was too much work. Full source code for Unity is here: https://github.com/seuribe/flip, if you're interested in compiling your own mobile version.