hello, dev here. since flash is not supported in browsers anymore, you can play this game by downloading it.
it is available as a .swf file for PC and Mac, or as a .apk file for Android devices.
to play a .swf file, you'll need a swf player. you can find many online by searching for "SWF file player". install one and you should be able to run this game.
a comment below already linked one, this could work for PC users:
http://www.softsea.com/download/SWF-File-Player.html
and for Mac users:
https://mac.eltima.com/swf-player.html
as for Android, simply download the .apk game file from this page, install and open it, and you should be ready to play.