Hard Driven

Get to full speed and press "N" 
for neutral. Now you can cruise 
along at full speed with easy 
steering and invulnerability. 
As long as you stay in neutral you 
will also have unlimited time. 
Another trick is to repeatedly hit 
the 4 key (4th gear) until the 
program has an error. Continue with 
the right mouse button. Repeat until 
you get a high score.