I'm not sure how this will work with a front-end. It is a simple .exe file, so maybe someone can answer better than I can. If there is something I need to do I will look into it.
Combining 2 controls like that is do-able, but will mess with the control code quite a bit. I think it may be easier to make a special version that does this, rather than an all-in-one version. This could be the sort of thing available on request when things are more finalized.
About the AI,... I have thought about it, and the code is being written to support it. The first game release (not test) will just be 2 player only, and from there I will be able to add more players, including AI players. Ideally, it will play 4 players, with the option of any of the tanks being AI controlled, so you could play against a friend and also have 2 CPU tanks.