My first impression, that you have made a tremendous progress with the latest version of TAP. The layout is really beautiful. It runs smoothly. At the moment you can add a plane only at one pool and you can't simulate the flights. But that's more than logic, since this is a prealpha game. I've tried to create an crash in this game. This was happend when I've simulated the game for two years and than on the route screen, pressing pause.
(Maybe better to email you the files)
(Maybe better to email you the files)