Switch from controls 1 or controls 2 depending on what suits you best. To destroy other trains hit them head on. If there is a problem like the train keeps going spam the green flag or reload the page. If the score suddenly jumps up its because adapting the score thing with a griffpatch game is really hard.
I found Top Down 3D city experiment and decided to remix it as this, so have fun going around the city taking out other trains as you pass.Try to get the highest score possible. Mega thanks to griffpatch!!!!!!!! (if you see trains appearing from under, don't worry, just a glitch that seems to come with the more clones the server creates).