Fun fact: of you use the a-900 checkpoint then leave/Die the game at room A-901 you will have the A-1000 menu screen. (Note: you must have the badge for this to work)
congrats, i was stuck at A-999 cuz for some fucking reason the A-1000 door won't fucking open no matter what i tried, really envious seeing people succeed :c
it happened to me too i was at A-95 and my heart was beating so fast because i was almost at A-100 so i began speedrunning without hearing if A-60 was coming or not but right when i opened the A-99 room A-60 spawned and it killed me