Firstly, this looks amazing, very well done. I have noticed a couple of issues though
1.
I just completed the first dungeon and it has not got stuck on the "Instrument award" section. It's stuck with link holding the instrument above his head, the "sparkles" are falling into the instrument and the instrument is changing colours. The game hasn't crashed as I can still press Start to bring up the menu. If I choose "Exit to the Menu" it takes me back to the file select screen and I reload the save. It starts at the dungeon entrance with me having beaten the boss but no instrument. If I go through to collect it again, the same bug occurs (tried five times now). AS this means that I cannot actually collect the instrument, the game does not trigger the "Bow Wow kidnapped" upon return to the village meaning I cannot contine the story
2.
This one is nowhere near as important. The Trendy Game speed is not correct (if attempting to make an exact match for the GameBoy version). Either the crane is moving slightly too fast or the conveyor is moving slightly too slowly (unsure which). Not a huge deal, but thought I'd mention it in case you're going for 100% accuracy