Download the newest version of Python 2.7 for your operating system. If you have a Mac computer, you will probably have this installed already. The Space Shark code does not currently work with Python 3, although if you are familiar with Python you might like to try modifying it to work
Install Python to your computer.
If Python installed properly, try opening a Command Prompt (Windows) or Terminal (Mac/Linux) and typing python or python2.7
Once Python is installed and working properly, try running spaceshark.py from the folder you downloaded earlier. It will probably tell you to install some libraries. If you have pip installed, run pip install --upgrade <package> to install the package. This may take some time!