At level 12 there are two red doors.
The right door contains the dot operation, the left door contains the rest of the level.
If iI follow the the left door, iI quickly get stuck at the 'isOver' puzzle, since the dot operation is needed here. However, iI am not able to go back to the red doors in order to enter the left one, sincesince the text is removed and iI cannot cross the gap .
How do iI get back to the red doors so iI can get the dot operator?