Quick thoughts on the new rules.
Some of these Modes are super hard to complete lots of shots!! I think the new forcing you to stay in the mode makes it a lot harder to spell Knights as that requires less shots than completing the mode, yet you are stuck in the mode until you beat it.
How about this an option to continue the mode after you drain or opt out. Also instead of starting the same mode again when you timeout maybe just move on to the next one again.
So for example if you know you are one shot away you can keep going and beat the mode, but if you already got you knight letter but have a long way to go you can work towards another KNIGHT letter.