This is probably the best fan remake I've ever played. I can't really give enough praise for this, on both a technical level and just the sheer amount of love for this old game radiating from every part of its production.
This isn't just a remake - though all the classic LRR content is there. It's more akin to an expansion or even sequel. If you've come looking for a convenient way to play an old game on a modern PC (as I was) then prepare to have your socks blown off. Personally, I would've been happy with a somewhat janky reimplementation that was hacked together that mostly worked, but this is so, so, so much more.
I could probably spend hours listing off all the new and improved features of this remake, but I won't. In short, this isn't just a simple fan project. It's a fully-featured, polished and expanded package that, if it were officially sold as a remake/remaster, I would be incredibly impressed by the quality.
Props to Baraklava and any other contributors. My only hope now is that you don't suffer too much from success and see Lego come spoil the fun.