You really need to find a better way to handle the save warning. No matter what settings I use in my browser (Vivaldi), I cannot load the game. It seems to do so in its own tab except the warning still pops up over everything else and I can't do anything other than... Clicking the window to open the game in yet another tab where the same thing happens. You should provide a bypass for that and a save to file/load from file option instead.