Experience

Effect Determines level (each 1,000 experience adds 1 level)
Starting Value 0
Maximum Value 9999
You gain Experience by killing monsters, and you can also gain a nice chunk (500, to be exact) for rescuing a Princess. Experience feeds into Level, which may or may not have any real effect on your character. You will need to accumulate at least 7,000 Experience to win the game, however.
Compare Experience to other Stats
Food Coin

Related

Adventures in Space

Page 5
Obtain a Shuttle and become a Space Ace by destroying 20 enemy vessels, locating a Time Machine in the process.

Experience

Effect Used to buy spells
Starting Value 0
Maximum Value 99999
You gain Experience by killing Monsters, and you can also gain a nice chunk (3,000, to be exact) for rescuing a Princess. Experience is used (in addition to Gold) to buy spells, but beyond that I'm not sure it has any game impact. There are a number of ways to get ridiculous amounts of Experience, including killing a King (which is worth 10,000) and going into space (each enemy vessel seems to be worth around 3,000).

Experience

Effect
Determines level (each 100 experience = 1 level)

Exp

Range 0–9999
Effect Used to determine level