Like metorical mentioned in the last entry, there will be score bonuses for certain things. For instance, you gain a bonus for each life you have remaining at the end of the level. You also gain bonuses for any extra ammo you have remaining.
I'm also going rebuild the title screen to give it an 80's arcade game motif. Right when you start up the game, you'll be presented with the high score table, and some little animations going on in the background. All names on the high score table ar three letter initials.
I wish I could make an online score table, and have been trying to come up with a way to make it work, but no luck so far.