All of the arenas are the same, so it sounds like you were following the proper game loop and not bugged.
We wanted to create a story driven game where after cleaning up the slimes you would slowly work your way up the Wizard's tower, learning some magic casting along the way as well as being exposed to different weapon types. Eventually you would confront the Wizard for kidnapping you, and hopefully beat him - thus beating the game. If development ever continues - that is the direction we hope to go. But for now, the game does not have an actual end, you just keep looping between mazes and arenas until you die - the goal being to see how high of a score you can get.