Get  to  full  speed (preferably but not necessary) 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 have
unlimited time as well.

     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.