@cai567890 Save games can glitch, it makes us angry too. Make sure though by clearing your cache or trying another browser, sometimes it just *looks* like the save game is gone but it's not. And if you make a new save game over where the old one was, it will be gone forever.
It's usually less our save game system, and more the way the game handles our save game system. Unfortunately, this means each game may react differently and bug out differently. For the most part, Kingdom Rush games in general are very solid in this regards.
Browser add-ons, security software, busted browsers or poor internet connections can corrupt files as well however.
