In order to access the game on PC, you must download the game through a game file, or play it through an emulator. In the link below is a trustworthy emulator from that can work on Linux, Mac, and Windows. You can go to the site and download the "stable version" or the "Nightly Version" if the Stable has not came out yet.
In order to play the game after installing the Emulator, you must have a copy of the Game's file, that is where a ROM file comes into play. A Read-Only Memory or a ROM file allows for a game to be downloaded onto a file and not tampered with. It will most likely be in a zip file, which you may use applications like WinRAR, or 7-Zip to unzip it to a useable format. Once unzipped, use your emulator to open the ROM file and then you will be able to start running the game.