Really great game. Good job! I only had two complaints. First, starting back at the beginning after every death was a hassle. I didn't want to walk back through empty rooms over and over again. The controls were good and felt responsive during combat, but I don't think they were well tuned for quickly running through empty rooms. That's not such a bad thing, but it just made the restarting from the opening room worse. I think just restarting from every boss would be much better. The other complaint I had was twice I had cleared a room, opened the treasure chest, but left the room and died before going back to it. This means I lost that level up. Thankfully you had the foresight to put in more powerups than needed. This might sound like it was just my fault, but both times happened in a room I could enter and kill all enemies/shoot chest to open, but couldn't physically reach the powerup from that entrance. I don't think that was a good design.
I hope it doesn't sound like I'm complaining too much. I'm just trying to give some constructive feedback. Overall, I thought it was a great game and I spent about half an hour to clear it. I did not see the Zelda inspiration until I read that in the description after. That's a good thing, I would think. I'm going to go check to see if you have other cool games on here.