There's no means of converting Lemmini styles to NeoLemmix at the moment (other than doing it manually), so that could be problematic. Of course, with the NeoLemmix graphic set format documented, and LemSet being open source, there's nothing to stop anyone who feels confident with doing some coding from making a tool to convert them. (Yeah, I know, I'll probably end up making the tool eventually. xD)
Simply throwing the levels in as-is somewhat defeats the purpose of using NeoLemmix; at the very least they should be modified for accurate steel, cutting out empty space, etc. While I might be okay with merely
including levels from such people, I definitely think I draw the line at modifying them. It may take longer to get the pack done this way, but I think it's a bit more ethical too. And besides, the more original content, the better; and if that doesn't happen, then at least the more intended-for-NeoLemmix content, the better.
At the very least, at least levels should have blank space removed (by using the resizing / shifting the level), and all skills with zero count removed.
Yep, Sega style is fine. Beyond the unusual colour scheme (which could also be said about Psychedelic and maybe even Circuit styles), it doesn't really stand out any more than any other specific style does, so I don't think it'll look too out-of-place.
One thing I'm wondering about is training levels. Should we have some kind of training levels in this? Perhaps a dedicated rank for them, covering not just the new skills, but also the new types of objects?
Also, thanks to a batch-submission from DynaLem, we now have 10 levels total (including my new one posted above). I'm willing to bet the current contest will result in at least one or two more potential submissions too. 11 if you count "A Little Breather" (from older versions of LPII); I didn't think of that at first because I haven't extracted it from the old data files and put it into my "collection of potential levels" folder yet. That one aside, you're probably only going to see completely-new levels from me in this (and if this project doesn't go anywhere, I'll either distribute them as a NeoCustLemmix pack, or include them in a new project).