There is a bug where if you press the movement button too quickly while moving it disables all of your controls except for restarting. (Have not encountered in the '3d' section, only the '2d' one)
Did rebirthing change in a newer update? i used to be able to rebirth and multiply pretty easily, now im still over 10x smaller with 2 more bosses killed and over 4x more rebirth time.
 "Doodle Alive"){kind=icon}
 "NGU IDLE"){kind=icon}
 "Three Goblets"){kind=icon}
 "Meat Boy"){kind=icon}
 "Mine of Sight"){kind=icon}
 "Bush Whacker 2"){kind=icon}
 "Infectonator 2"){kind=icon}
 "Insectonator"){kind=icon}
 "Doodle God 2"){kind=icon}