Very nice game! I love the graphic look... kind of an NES look, but if it were a more powerful system. All the elements mesh nicely for a very cohesive look.
The music and SFX seem to be free assets, but they're all great choices that add to the experience.
The gameplay is fun and engaging. It definitely has a Zelda vibe. I enjoyed my time in the levels included in this demo.
My main critique/suggestion would be that the movement speed of the character seemed a little sluggish. I suppose faster movement might change the overall game balance, but there's probably a way to address that.
Overall, I had a great time with this entry! Definitely one of my favs!