I love the look you made for the sprites, still holding the feel of the 8-Bit while giving more color like a 16-bit style. Big Kudos to you on your work! I'm sad to hear they aren't available but I totally understand. If I called myself a horrible pixel artist, that'd be over selling my abilities. I'm working on making my version of this game as well and hoping to have the first vertical slice out later this month. I also plan to make it free, as I don't want to mess with any legal stuff, but thankfully Konami seems to have been pretty generous to fan remakes over the years.
And I hear you on the stairs! I finally got them working in my game, but what a nightmare they were. I still don't like my solution behind the scenes but it works. Now I just need to get the knockback working better. :-)

