You won't have too many difficulties in beating the nights 'til you'll be around the 10th one.
Yes, I continuously play my games during the development process (it's called "debug" or "playtest") and then, when they're released, I keep playing them now and then to make sure they are still bug-free.
Anyway, the most important thing is that the games I make are games I like to play.
Thanks for asking!
Bye! 😃✌️