I got at least 1.2 km. Basically just used a unicycle design with a jumbo wheel three large engines tetrised atop each other and two normal engines on the side, as bumpers. Could have likely kept going indefinitely if I was slightly more careful.
this is my high, but i will beat it, soon
i found a glitch and my car is now ALMOST invincible.
i tried this, the only bad part is that the bottom is 2 low
nice find! thank you for playin buddy