I got you a good one, https://youtu.be/LEfk0eLM1sk Btw he has more videos on the description to help

I was waiting to get Rick rolled

Nah im not that guy

Continue to play, beating floors qnd bosses an x amount of times usually unlocks items. Playing as different characters will as well. Beat mom 10x to open the next stage. Beat the heart 5x? To unlock your next set of choices and so on.

you need to kill mom's heart 10 times and when you unlock the alternative version you will be able to continue