Thank you so much for taking the time to give us your input! It is truly appreciated and helps motivate us more to finish up the post-jam version of the game :).
The game does technically end after the dragon fight. Unfortunately we had less than 10 minutes left to add the "final" boss to the dungeon. It exists in the game, but only if you skip the Dragon and go straight to the stairs. The final boss cannot be killed in its current state so its really just a means of ending the game. I made a mistake when adding the crystal that spawns the final boss to the dungeon and accidentally made it despawn when the dragon is flagged as being dead.
For the world map there were plans for items that would decrease, eliminate, or increase encounter rates, but those were scrapped due to time restraints. The ultimate goal is to provide the random encounters some much needed balance and make regular enemies more threatening. I've already begun revamping the stat system so that we can have a more dynamic means of damage calculation that doesn't create such a huge disparity between regular enemy and boss strength while still maintaining a hopefully balanced level of difficulty.
Hopefully we will have a more fully-realized version out in the near future that will correct all of the issues and be a much more complete experience.
Again, thank you so much for your input and kind words. It really does mean a lot and I'm sure I will be coming back to this thread regularly to re-read your post as well as everyone elses to keep the input fresh :)