Navigate to the 'win32' downloads folder. Download the latest .zip file and extract it by right-clicking and selecting "Extract files" or something similar. Run 'sandbox.exe' to play.
Navigate to the 'linux32' or 'linux64' folder for 32-bit or 64-bit Linux, respectively. Download the latest .tar.gz archive. Untar it and run 'sandbox' to play.
Mac OS X:
Coming soon. However, running the Windows version under Wine (http://www.winehq.org) should work.
BUILD FROM SOURCE