Thats really awesome that it worked in Firefox!
We are going to add more puzzle games, thanks in part to this feedback so thank you for letting us know! We will also have a chat about the fossil ratings. At some point we are going to redo that whole menu, as the game gets bigger and more complicated that menu will need to change. Sooo we may just leave it for now and wait until we update it properly in the future, we will see. But good to know you wanted that feature! thanks so much for playing :-)