I have now built a launcher for platformer hell so it can be played offline

just run the launcher.exe and click install python (used for local hosting) if you do not have it

then click launch platformer hell

it will open a console which is the localhost and a browser

just minimize the console and the browser is just platformer hell

when your done just close the console and browser and the launcher and done

link below

Platformer Hell PC by useless_gamer_games (itch.io)