Been out of the world for a bit. Nice to see that there's been some ongoing interest in this project.
I'm not sure when I'll get around to doing any more work on this, but I would like to respond to some of the issues that have come up. In one of the reviews, there's a bug report about the starman music being glitched. Also, messatu's additions probably deserve some looking into as it seems some of them purport to be bug fixes as well.
Current Bug Reports
Starman Music NEW I plan to investigate this and fix it if I can reproduce the problem (and figure out the cause).
Vines Broke NEW It seems like I'd have noticed this myself if all the vines where broken. On the other tentacle, there was an issue with one vine and some hacking was needed to work around it, so I might have broke the rest of them. I'll have to look and see.
Enemy Placement WONTFIX This is a limitation of the SMB engine and can't be (practically) changed.
W4-3 Dead End WONTFIX I've said it before and I'll say it again. The dead end in W4-3 is intentional, it's in the source material and, while a cheap shot, appears to have been a deliberate trap. That said, you can hack it yourself if you'd like.
Elevator Appearing WONTFIX The original behavior (even if intentional) was caused by an engine limitation in the original. The SMB engine doesn't have the same limitation and I don't plan on adding it.
Colors WONTFIX Part of the point was to give the game a facelift. Going back to ugly isn't gonna happen.
Backgrounds WONTFIX The way backgrounds are handled in the SMB engine and the SMBS engine are entirely different. Fixing this would require basically rewriting the engine.
Level Layout Issues WONTFIX The way level data is represented in the SMB engine and the SMBS engine are entirely different. Frantic has endeavored to make the levels as close as he can and extensive engine modifications have been made to support this. However, 100% accuracy isn't a realistic goal at this point. If you feel anything is very wrong, point out specifics and I'll look into it.
Two Point Oh
As I've mentioned before, the additional enemies and power ups have effectively been abandoned at this point. They've been pushed off to the 2.0 release. And that has been postponed indefinitely. However, to paraphrase Yoda, "Use the source, Luke". It's all available and anyone who really wants to see it done can do it themselves.
1.0-RC1 is currently in the database (with source code available), so if anyone is interested, beta testing would be appreciated. Once I investigate the Starman music and the Vines, if no other (legitimate) bugs are reported, I intend to release 1.0-Final shortly. Also, any daring soul who'll try building the source package and give feedback would be greatly appreciated.
Edit: Messatu's hack removes the RHDN credit from the title screen. That's just rude!