Read this briefly before downloading the game.
Find 0 version 3.0 (GUI) & Help Text file (if you want help, save this in the same folder as 'Help.txt').
Find 0 version 2.1 & ReadKey (must be downloaded with 2.1).
Find 0 version 2.0.
Find 0 version 1.0.
Things to do.
Need help understanding the Boomerang Effect? The answers are here.

If you see the text of the program, like I do, just copy and paste it into Idle or any text editor that will allow you to save as a Python program.
Though I do not know of any browsers that just ask if you want to open it with default/download/save it to a disk, if that is what your browser does, you can just download it.

For the current 3.0 version, I have a compiled version, but that means you can't go in and edit the constants. The plus is you can just click on this link and, in most browsers, start playing right now (help file not included)! Check it out! Note that you will not be able to recieve help.