Sorry for taking forever to reply!
wonderful! Never ever heard of this emu, it was really advanced for the time!
Is there something like that for other consoles too?
Yes, there's a specific version of "MyNES" emulator that allows the creation of hi-res graphics.
However it's insanely complicated to use (God knows I tried!).
I would love to see other emulators with these hi-res tools too (Specially for Atari 2600, NES, GameBoy and MSX).
Nice! This is awesome. Do Zillion and Quartet next
I really love the old Sega Master System games. This should be really cool to try out. Would be even more cool to figure out in the emulator how to add functionality for Sega CD like Kega Fusion has. This way Master System games can have mp3 soundtracks to them. Along with the HD Graphics that would be pretty damn cool. Though as it is this is great.
Thank you!

I'd love to see hi-quality sound added to these Roms too.
These vids look great. How far would you say you're into the game percentage-wise?
Unrelatedly, I think I came across some old forum posts where you may have been working on a Sunman-to-Superman NES hack, black & white, George Reeves style. Am I correct there? If so, do you have any screens or vids of that still floating around?
I don't know how to say much is done - but there still are A LOT of graphics to be changed.
At least it's a small game with just a few sprites and backgrounds (compared to later SMS titles).
And yes, I was trying to turn Sunman into Superman many years ago.
I can't remember exactly what happened - but I guess I wasn't being successful in changing title screen sprites. So I give up.