1.I think，All railway modules in a simple airplane should keep the same width，The train track modules on official website vary in size，This leads to a map that most trains don't fit or can't use，Greatly reduce the sense of experience.

2.We should not just develop automobile engines，Electric motors should also be developed，For example,I need to make an electric car now，but，Because the engines in this game are only airplane engines and car engines，That doesn't sound like electric，and，I hope the engine can turn off the volume，For example，I have been making subway trains these days，I want my hearing to recognize the feeling of the motor，I tried adding a jet engine(There is a model that sounds very similar.)but，I went into the game test and found out，The noise of the car engine is too loud，It makes it sound very strange，So I strongly suggest that，Add motor parts！！！