On error in strict mode you call the resetgame function which hides the strictOff button (leaving no visible button to control strict mode) and sets the strict variable to false. You can remove those 2 things first but it also calls newRound() at the end of the function, so you could change that part to something like
this should cause non-strict mode to reset as intended when reset button is pushed, and strict mode to only start over when you manually click start.
Beyond that, I cant find what disables clicking on the play area before starting the first game ( or enables it after) in the time I have. But once you start a game you can hit a button at any time even at the game over strict mode screen and it counts as a bad play. if you can disable clicking gameplay buttons at that screen, I think you’re good.
Hope that helps,