Wow, this game is very ambitious for the time frame! A large world, multiple bosses, detailed artwork... It seemed a bit obtuse at first with the size of the world and lack of direction, but it grew on me as I played and I really enjoyed it in the end.
Navigation is a lot easier with the item that shows the locations of certain points of interest on the map. I think the map could do with some of this by default (have it keep track of things you've already seen).
The sound design is a weak area. The music is nice but the lack of obvious sound effects for most actions makes the game feel a bit empty.
But overall, great job!