Awesome!!!

I just tried it and beat it, too.
I was able to get the big wallet and the big bomb bag. Plus, I found the fifth heart container and the wealth medal, as well. (I'm not sure how you pulled off the 8-step maze trick; making no secret sound after the first four?)
I got the purple potion early (the first thing I actually bought), not knowing when I'd use it. I found my opportunity: the room with skulls, traps, and a pushblock. Using the purple potion there really gave me my money's worth!
I enjoyed the interesting music you chose, as well as the cool SFX you used. I'm not sure what game the "Link Hurt" SFX was from; probably something like Wind Waker that I haven't played yet, I'm guessing.
The dungeon was really challenging for a beginner dungeon!

But not too challenging. If you'd thrown any harder enemies in as the player progresses, it probably would've been too hard. The hardest (besides the miniboss and boss) were the eyes (I forget what they're called) that shoot magic. (Yeah, I got hit by their magic once. Ouch! 2 whole hearts!) Thankfully, you allowed them to be hit by the arrow at any time. I was afraid I'd have to wait until their iris turned black before I could damage them!

(Although, that
would be an appropriate challenge for a later level...)
Just one issue
I had (not sure about anyone else) is that sometimes in the level, I would experience lag (where the music runs as normal, but everything on the screen moves about half-speed or less, including Link and the enemies). Sometimes it would last for a while. Sometimes, going back and forth from one screen to another (staying in the doorway) helped it to stop, but not always. I'm not sure if this is just because my computer might be a little slower than everyone else? Or is this just part of the curse that's not explained??
Anyway, definitely well done!

I think any other problems/issues I had were minor, 'cause I can't remember them.