I owned a 5" floppy of ONML (which required the original game to play, so I could never play it) and I eventually threw it out when I got rid of my 5" floppy drive. D:  Quite disappointing now.  I bought Lemmings Revolution a few years ago, since it's the only PC Lemmings game that I've ever seen in a store.  Quite a disappointing collection altogether.

Now after breakfast: The editor is closed-source for some reason. So it's random trial-and-error time.

The day after: Eric told me he has lost the Lemmix editor source due to a disk crash. :-/

I have the Lemmix 0.0.10.0 source.  (You'll probably have to rename the download since the IPv6 gateway doesn't seem to forward the filename properly... or just use this link if you have IPv6.)

If I were implementing it, I would use some sort of hash without any random numbers.  SHA-1 is popular enough that you ought to be able to find an implementation in your language of choice since you probably don't want to reimplement it.  We're not specifically looking for a strong hashing function here, so even CRC32 which wasn't designed as a hashing function would probably get the job done.  Or if you want to go nice and sturdy, use a Tiger hash. 

I wouldn't worry about performance either.  Hashing isn't all that expensive.  Chances are good that whatever hardware you're using can hash faster than it can read data from a rotating magnetic disk.

Unfortunately, it appears that the IPv6 gateway doesn't pass on POST requests.  If you have IPv6 (probably most easily via a Teredo tunnel), you can get to the site at the old address and upload.

It's only a bit weird that all sorting criteria seem to share the same Ascanding/Descending Flag, so whenever you pick one criterion, the flag gets toggled, while I think it's more common to set it only when you click the same criterion twice in succession;

I tweaked this a bit, now there are arrows, so you can pick the sorting you want right off the bat.  Slightly smaller to click on though...

sorting also takes capitalisation into account.

Unfortunately, case-insensitive sorting isn't build into App Engine.

Pretty much done, so here's the new Lemmings Level Database which is hosted on Google App Engine.  I've populated it with the data from the old database.

The only major feature missing is uploading a new data file for an existing level pack, so currently you have to delete the level pack and upload a new one if the data file needs to be changed.  I may or may not change this depending on if I have free time to work on it again.

If you encounter any issues with the new database, let me know.

I am without hosting right now, so I'm working on putting the level pack database on Google App Engine.  Don't worry; they're not gone forever -- but it will take me a bit to get everything working.