If you are looking for free ways to play or download the classic version:
: You can play the game and its sequels directly in your browser at Classic Reload without needing a download.
You can download as part of a collection or through various retro gaming archives. Digital Purchase and Collections
: Sites like The Abandoned Gamesroom also list the game as a free download. Modern Spiritual Successor
For a modernized experience with high-resolution support and Steam Workshop features, you might consider Contraption Maker on Steam . It was created by the original designer and programmer of the first game. Compatibility Notes