Seems from open source – Tetravex Lite Review

I don't know for sure that this is taken from open source and then converted to a paid app on the iPhone but I do know for sure that there is a free implementation of this game under Linux. There is nothing wrong with using/copying the code if the author gives the changes back to the original author. And of course writing the code from scratch isn't wrong either even if the idea was taken from someone else.
Review by Jblaich on Tetravex Lite.