itch.io is a game distribution platform with many indie games, including browser games.
All Itch browser games (Assuming the games don’t have copy protection or use blocked resources) can be downloaded using the Itch app except for games that have both a free browser version and a paid version, such as Big Tower Tiny Square. Instructions are below.
Go to itch.io/app and download it.
Run itch-setup, launch itch, signup/login and then search for the game you want to unblock. Then press install.
Make sure you’re installing the HTML version which should look like a 5.
Press the manage button.
Press manage.
Press show in file manager.
You’re done! Now you can host the files.