I have not yet tried to find out the licenses/authors of 3d graphics and textures (and don't know if I will). It seems however that they are all original. (And I like them.) There is no sound yet.
graphical editor for it (though I wasn't able to find the tool).
Fictional Air Combat reminds me of Thunder&Lightning, which was unfortunately updated last time nearly one year ago.
Watch the video in high definition.