I think this game can be made more wonderful by adding the following three things

1. Airship If an airship is added, you can build an aircraft carrier like the USS Akron.
2. Unmanned air vehicle If an unmanned aerial vehicle is added, it can be mounted on an airship as described above, or it can be mounted on a large bomber like the XF-85. If an unmanned aerial vehicle is added, it can be mounted on an airship as described above, or it can be mounted on a large bomber like the XF-85. The control of the unmanned aerial vehicle is set to a certain extent in advance by the player (for example, how much fuel should be returned to return), and simple instructions (start, return, interception, escort, patrol etc.) are issued during the flight. I think it would be better if you At the time of battle, each drone will complement and attack enemy aircraft with its own radar system (though it would be better if there was also a data link)
3. Turret I want you to be able to create a fully automatic turret like CIWS for mounting on bombers and ships