As others have said, this is a great game! I enjoyed my time with it, but unfortunately I just encountered a game-breaking bug:
In the Fire Temple boss room, if you beat the boss then exit the way you came, the last door no longer leads to the ring room. Instead it leads to a room on the other side of the dungeon. Similarly, if you leave the ring room the way you came, it takes you elsewhere in the dungeon. Doing either of these things means you can never get to the ring room, which presumably means you can't beat the game. My guess would be there's a second copy of the boss room with no boss in it, and that one has the wrong transfer event?
Leaving the temple doesn't fix the issue. Exiting the game doesn't fix it either. This is a problem, as I exited to write this comment forgetting that the game auto-saves and has only one slot. On a related note, is the single save slot a necessity or stylistic choice? I'd prefer multiple, personally. Good game and I may start over another time, but obviously the glitch is a bummer.