I managed to do it the first time luckily haha It is also interesting you can open all doors on the way to the 4th floor. But after you trigger the delivery event, you cant open them afterward But either way, really love this style of game! I really hope to see more from you.
Cx The reason you can explore all the floors is that I wanted to convey the experience of getting lost making a delivery in a weird apartment building (I am actually a food courier offline)
During the escape sequence i locked the other floors to keep the pace of the game more focused :3