This was a REALLY good entry. I like how you kept things simple with the battle system, but had a few classes with different powers. If the player had a physical copy it seems like the maps would work well if the player used spare change as tokens (pennies and nickels).
I played through this as the Fighter and had a lot of fun using the hammer to knock over things on the map (and take out enemies in the process). The other classes look fun too.
The gamebook would benefit from a little more art, but I can see the awesome core of it shining through regardless. Well done. =)