This is a fan-made copy using the original game assets and written from scratch without the source-code - it is not an official game.
Nope, you don't need Wine or any Windows emulation software to play on Linux or macOS machines. Just extract the game and play!
No, LAN support has been replaced with online gameplay. You can still play with up to 4 players on the one machine using a keyboard or game controllers.
Yes! Any puzzle set made with The Legend Returns or Mad Monks' Revenge will work with this game. Any puzzles made with this edition that utilize new tools or players won't open in the original games.
You can also import puzzles from Lode Runner Legacy into the Editor.