This is the game I made for Ludum Dare 13, in only about 27 hours (not including sleep / meals). I started late.
Basically, I was totally peeved with the road theme so I decided to go with something totally different (and a little racist). I tried to find things that I could pretend fit the theme but were actually totally different, and eventually found rhymes for road, which were explode, implode, and reload. That got my mind working and it became a game where you play as an asian with a bad English accent.
And turns out it actually does take place on a road and in a car. Oops.
Webstart
http://www.otcsw.com/webstart/ExproadImproadReroad/ExproadImproadReroad.jnlp
My Ludum Dare page (vote for me, good or bad)
http://www.ludumdare.com/compo/?category_name=ld13&author_name=demonpants
Controls
WASD or Arrows - Move truck around
Mouse - Aim your gun
Mouse button 1 - Shoot and exproad
Mouse button 2 - Shoot an improad
Move mouse to left side of screen - Reroad
F - Toggle fullscreen
Esc - Quit the game
Backstory
You are a humble Chinese rice farmer who is just turning in for the day when you hear groans from behind you. Oh noes, the terrible rice-eating zombies are back (in China, zombies eat rice, not brains, similar to how in France they eat frogs and in Egypt they eat pyramids), and they’re after your rice! Your faithful brother and you load up your pickup truck with all the rice you can carry, and he takes the driver’s seat while you man your giant RICE ROCKET. The zombies can smell that rice, though, and they’re putting up a chase! Everyone knows that even if you blow up a zombie (exproad it) it will pull itself back together, so you’ve got to exproad them and then improad their fleshy bits while they fly in the air. Good luck!
Object
Basically, you want to defend your rice from the rice-eating zombie plague. You start with 8 bags, and when you get down to 0 to lose. If a zombie touches you, he takes either 1 or 2 bags. In order to kill a zombie, you’ve got to first blow it apart (with left click) and then implode its pieces (with right click). You’ve only got a limited number of shots, however, so move the mouse to the left side of the screen in order to reload. The game gets progressively more difficult the longer you survive. You can’t win.
Future
I will probably add some new stuff, like I already have score half-working, but the game was spazzing out when I was drawing dynamic OpenGL text. Must have messed something up. Basically you’ll be able to beat levels, upgrade your weapon, etc. etc. The usual.