Nice work! I played this one to the finish and enjoyed it. It gave me Castlevania vibes in the art and player movement, and the NES feel was excellent all around. I love a few secrets in a game so I wasn't disappointed there (no spoilers). Early in the game I fired several times at the knight and it didn't defeat him, so I figured the armor prevented gun damage and stuck to the sword for the rest of the game, assuming the gun was for the assassination scene. When I had passed through the series of roof chambers and approached the final scene, I was *ready* with around 60 bullets.
Nice job on this!