@bloonsoverlord Maybe you're playing on Google Chrome. With me Google Chrome doesn't save my games either, but Internet Explorer works fine. I don't know what the other browsers do.
The 'Old Glory' Minigun seems to be weaker than the sniper rifle. It could be my computer but I just don't know. Anyone post a comment if you noticed this too.
Three suggestions:
1) Uranium, spreads radiation which makes all things around it turn into fire (except for metal and block).
2) An electic torch, which spreads light.
3) Solar panels, which absorb light and turn it into electricity.
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