Been playing it for a few hours, completed the fun levels (then there's a new updated version meaning I have to start all over again, grumble). This is a master class of programming the C64. It all looks amazing, and while Nordischsound's music may not be very Lemming-like, it's still a great accompaniment to the game (although on later levels I'm sure it'll still get on my nerves after I hear the same tune dozens of times over while trying to solve a level.... that's not his fault though - and I was like "WTF!" when I heard Gangsta's Paradise accompany one of the levels). The addition of mouse control is great and I like the speedups on devices/machines that support it (tried it with my Turbo Chameleon cartridge, works great even if that doesn't support cart image saving). Pity there's no more then 30 lemmings on any level, but I can see the sprite flickering limitation is pushed to its limits already (plus chugging a stock C64 with that many), so I guess I can't ask for more. A great conversion all round.
A few things I noticed while playing:
1. Is there an option to start at the first level of Tricky/Taxing/Mayhem? This option exists in every conversion of Lemmings ever made (including the official C64 conversion), it should be here too. I know I'm gonna get stuck in later levels of the higher difficulty settings (and unless someone puts up a walkthrough on youtube or at the very least a full level password set I probably will never finish it), so the option to at least see a few levels of each difficulty setting would be nice. And since it has always existed in every conversion ever made it should be mandatory here too.
2. I noticed on some levels, when I set a Lemming to mine partway through a platform/ground (but not all the way), then make them a builder to stop the mining, they would still fall through the bottom when they turned around, and other lemmings would also fall through if they walked along the mined path. I found this most prevalent in Fun level 10, where when I was trying to complete the level as I do on all other versions, by having a lemming float down to the surface while all the others are trapped in a hole by a digger, when I made the lemming that floated down into a miner, then turn him into a builder to turn him around, he always falls through the ground, as do any other lemmings that walk over to the right afterwards.
3. On any level where I set a lemming to build and there is a background graphic present at that spot which they would normally walk past, such as the walls of an exit, they act as if they have hit a solid object and turn around immediately. Surely this should not happen if the object is supposed to be in the background and they normally just walk past it?
As I said at the start though, already a great conversion and I look forward to playing as much as I can (before I inevitably get stuck) very soon.