It's horrible to play it from the browser using the built-in Ruffle, and if you're wondering for open this game on Newgrounds Flash Player, no, replacing "https://www.newgrounds.com/portal/view/" with "newgroundsplayer:", keeping the ID 615589, doesn't work either because nothing happens when you click "START", so I had to find a way to download the game's swf file so I could play it locally, still the game is very entertaining and fun