I've released a new version of the game with a few minor changes:
-Rare Flowers are easier to get; they drop from more enemies, and can now be bought
-The Green Castle hidden switch "puzzle" was removed entirely (except for the optional gate)
I also can't believe I forgot to change this page's status to "Completed." Big oopsie.
Finally, this game is done. Years of experimental shenanigans and improvements have led up to this.
Please let me know if you run into any problems (hopefully there are none), and feel free to give me some feedback about what works, what sucks... too hard, too easy, too serious, too cheesy, etc. I've gotta say, it's been a fun and wild ride making this game, and it was the perfect opportunity for me to improve my graphic design and music making skills.