I released Tapt 2 at the weekend. It's a complete rewrite, sharing pretty much zero code with the original. I'll do a post soon explaining the reasons for that, and going into a few things I did differently this time around. In the meantime please check it out! You can search for it on the App Store, or grab it at the links below.
I've now taken Tapt 2 off the App Store; thanks for playing if you did!