Use the power of the WASD. Space for e-brake on ATV and space for firing on the spaceship. Double clicking the flag or clicking stop before starting it may mitigate some of those strange Scratch glitches. Space mode is not finished, hence the BETA in the title.
I made this using trig instead of the usual move(0)steps block so yay. Hit detection is quite buggy, so don't run into walls. Also, if you hit a wall at above 40 mph, you will explode and stop the program. Scratch seems to have some odd bugs with fullscreen, but maybe that's my end. Sometimes walls will randomly disappear and you may explode from accidentally smashing into them.