Nice small game. I really like the art style and the audio. An issue I have noticed though is that gold doesn't reset when you win/die. Also, the winning isn't telegraphed the best (I at first thought I've died when I picked up the end heart).
The hitboxes are also a bit annoying with how short your sword is and with how much larger the bomb hitbox seems compared to the sprite. I would also consider switching the keyboart inputs to either WASD, J, K or Arrow Keys, Z, X.