Your player level gives a representation of your experience, the higher your level, the more
experience you have.
Generally, the higher a players' level, the better that player is at playing The Merchant,
you should aim to get your level to the highest it can be.
You gain a level when you have sufficient experience to do so. In the lower levels
you require less experience to level up than in the higher ones. For example, to level
up from level 0 to level 1, you need 5 exp, but to go from level 7 to 8 you might need
about 100,000 exp.