Thank you for trying!
What was the problem with .exe? The game was built using JDK 8, with JRE 8u431 I can run the .exe on my machines.
Good point! I think about little “start tutorial”, where you will be informed about controls.
So this will be the first points in the tutorial 
When you come in the orange garage with car, on the position where Red car is parked, it should display a HUD text, that with E key you can open the menu. Same on the track, when you came to the right lane close to start line, on the side where the two black and purple cars are parked. You can attach the trailer using T key but you have to came really close to the trailer hitch side (as in real ). Then with trailer you can do the jobs which location could be displayed in the “F1” menu. Come to the yellow circle with the trailer and it will load the trailer (the rotation of the trailer matter, I need to edit the loading to be proof of random trailer rotation). Then you have to find green square where you need to place the trailer with loaded cargo and again press E to get the job done.
Will have a look on the camera.
Again thank you for trying my game 
!