Thank you very much for playing! Happy that you had fun.
As “Manbo” said in an earlier comment, increasing the time each time you score would be a good add-on so good players could manage to stay in play for a long time.
Oh yeah, I think that's a great idea! You could make it so as your score got higher you got less additional time from scoring, as long as it grants a certain minimum amount of time you could keep going till you fumble!