Since I warped to level 8 with less glitched graphics, this is still possible to follow where are going between rooms.
But this stage suffers with a lag nearly every room. I improved one room, changed a strategy in the room after the exit door, and accidentally forgot 6 frames to improve.
I finished this stage, but...starting the next level, the "X minutes left" pops up all the time. How annoying. Probably I need to verify more or probably risking with a even more glitched room 8 (which can't see almost nothing).~
EDIT: It seems that the message pop up starts somewhere during that warp setup. So, probably stage 8 has also suffered.