The following are the point value for enemies in Classic/XG mode:

Lander: 150 points
Mutant: 150 points
Swarmer: 150 points
Baiter: 200 points
Bomber: 250 points
Pod: 1000 points

Glitch: Messed up letters:
At the classic mode start-up screen (with "DEFENDER" in large letters), there is a small chance of the letters getting a messed up.