Only play this on Itch.io

I have discovered that games you wouldn't think get stolen and posted to other sites do sometimes get stolen and posted to other sites.

This project uses emscripten and I have found and modified very simple javascript code so that the game will only run here (and where ever I decide to allow).  The code is as follows:

EM_JS(bool, verify_site, (), {     if (document.location.host == 'html-classic.itch.zone' || document.location.host == 'localhost:6931'){         return true;     }            alert('This game can only be played at: https://nickthesic.itch.io');     throw 'Please Visit https://nickthesic.itch.io';     return false; });

It checks that we are being loaded from itch.zone or localhost.  html-classic.itch.zone is what seems to work and I hope that itch.io doesn't change much to break this here.   While 'localhost:6931' is what the default is in emscripten and allows me to run the game locally for testing.

It is a pretty neat feature that I will most likely add to all my projects now and moving forward.

For your own projects be sure to: 1) Use a water mark.  Let people know who you are 2) Link back to your site in game.  Direct people back to your stuff 3) (Optionally) setup this verify.  As a gamer, I hate DRM.  But as small developer I very much see the appeal of locking my games to a specific site.  If you have a water mark or links it may not be as bad, but you should be in charge of where the game gets uploaded

Enjoy jamming and be safe out there!