Tentacles wa the first game that Charlie and I started a few months after the iPad first appeared. The vision was to make a Pikmin style game crossed with Command and Conquer light strategy all using the brand new iPad touch display.
The game proved to be too ambitious for a two man team and we stopped development after 8 months. I have no doubt that we will return to this idea at some point.
Tentacles was written in C++ and OpenGL. The levels were designed in Blender and exported through a Python exporter and level munger. We designed and debugged the game on the PC and Mac using GLUT. To get the game to work on iOS we wrote a thin Objective-C shim