I’m glad you asked! The collected items become useful for a certain ending that I believe no one has found yet. Perhaps I kept it too hidden.
Hint, hopefully it doesn't give too much away
This game has you looking for exits. The items can be used during an unconventional exit that you can leave from after looking at it a few times. In the initial clicks it will not give you the option to leave.
Ah, great! I’m happy you already found that exit, nice job!
Out of the 12 endings, 3 are hidden within that exit
All ends have a name. If you don't see one and still see your bag.... perhaps it's not the end yet. You'll need to see all changed items to enter the path for the remaining 2 endings.