1. Download the zip file from 'https://www.speedrun.com/tools/Goime_500_.swf_files-20201230T230752Z-001_vp8yh_vp8yh.zip'
2. Download the Flash Player Projector for your system from 'https://archive.org/details/goime_swf' (Note that the Flash Player Projector is not an installer, it is a standalone player)
3. Unzip 'Goime_500_.swf_files-20201230T230752Z-001_vp8yh_vp8yh.zip'
4. Open your chosen .swf file with the Projector program you downloaded!

If you want to delete your save data to make starting a new game slightly quicker, on Windows you can go to:

[your username]/AppData/Roaming/Macromedia/Flash Player/#SharedObjects/[some nonsense string that's probably the only subfolder in SharedObjects]/localhost/[game version].swf/

and delete goime2.sol. (Please note that "[game version].swf" is a folder, not a swf.)

Under localhost, it might actually be located under Games/Flash/[game version].swf/. Dunno what causes this.

Thanks to thecnoNSMB for making 99% of this guide! Didn't want to edit their previous guide so made this new one.