Whatchu talkin bout? If you're getting an error that says something like, "WebGL2 not enabled," you gotta switch browsers.
On Chrome (while at drillur.itch.io/lored), press F12, and then on the left go to IndexedDB > /userfs > FILE_DATA, then look for "/userfs/godot/app_userdata/LORED/something.lored".
However, from here I have no idea what's going on. It must be taking the save file and "optimizing" it somehow. I can't read what's going on with it. This is one of the MANY reasons I hate working with HTML games. Debugging is made needlessly obnoxious.
Try playing the game in incognito mode. It won't try to load a save. If the game still isn't running, it's some error on your end