The controls I assume in Unturned 4.x will be very easy. There’s not much to vehicles in a game in Unturned. The most I can imagine in cars is a gear system that I mentioned in my article.
Cars
Gear System
I assume it would be easy controls like E - Up gear, Q - Down gear
Headlights
It would be cool to see like headlights you can place on your vehicle that can be controlled with H
Truck Doors
I think a control to open the back of a truck door should be added so you can walk in the back of a big rig and place stuff in there. This control could be like J.
Truck Picture
Airplanes
Gear
One of the only controls I could think of on airplanes in video games is the gear button to make the wheels come up. In Unturned 3.x you flew with the wheels out which is not how planes fly or else the wheels would rip off. I think a button like G bring the wheels in and makes your plane fly a little faster.
Plane Lights
I think planes should also have a button like L to turn on the lights so if it’s night time you could see it in the air. I think it would be cool to see interior airplane lights added to.
These are all suggestions I think should be considered because they would be great attention to detail and still benefit the game.