I like this. However, I dislike the way that points invested in upgrades before new game+ are lost. I'd prefer that invested points (perhaps unwisely!) were kept and the game scaled appropriately. I think that your core idea is very sound and can be expanded upon a lot. I hope you get a lot of plays, good luck. (first game that I can remember after 8 years on the site that's led to a comment, you must be doing something right!).
I'm not convinced about the javascript files being the cause of the visual bug. Using developer tools in the browser I managed to get to the options panel, and a hard reset causes the game to reload - without the bug. Importing my save then caused another reload, and the bug was back. Can't see why the server load would be to blame when the bug only happens when you've got a saved game.
Offline mode was broken for me this morning, but I logged out of Kong and then signed in again, and then forced a full reload of the game with CTRL+F5 and now it seems to be working again. Using Chrome/Windows, in case it helps anyone.
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