[EDIT]
Oops, this wasn't a question to me at all. Err, then take it as additional information
[/EDIT]
I'm going for a 640x400 resolution (the windowed mode may be a little more widescreen as on the screenshots, which are 800x400), so I use the Win95 "big" graphics. I guess the "small" graphics set should be pretty much the same as in the Amiga/DOS versions.
Then again, the "big" gfx set of the Win95 version is only partly a hires recreation. Most things are just scaled to the double size making them look quite ugly (especially the outer border).
For some of these tiles, I did some pixel painting to make them look nicer, but as there are so many "ugly" tiles, I gave up quite early. Maybe later on, if the programming is (ever) done, I will come back to this issue.
[EDIT2]
Ok, I just downloaded and tried jLemmings. Forget what I said about you can't tell the quality by the gfx since it doesn't matter anyway: the gameplay is FAR from being acceptable:
No real diggin/bashing (doesn't remove bricks), no object animation (water, traps, exit decoration), not even the cursor changes when it's above a lemming. Bashing most of the times doesn't work, the whole climbing/bashing/building etc. is not nearly working like it should.
The levels are not just bitmaps as I first suspected: also objects can be placed, but this is much simpler than in the original game (no paint modes like "draw on visible", "don't overdraw", also no flipping or removal). There seem to be no traps or "no brick" objects apart from entry/exit btw. So I it won't be even possible to recreate a simple standard Lemmigs level near 100% with this even if the (non animated part of the) level was provided as one large bitmap.
Also, if this in the alpha version and was compiled in May 2004, the chancesare quite low, that there'll be a beta soon.
And about copyright: I don't think that they would care, since there's a lot copyrighted material in the JAR file: they have the original WAVs (from the Win95 version?), ripped Mario-Gfx and also some Disney characters in an "about" screen.