[Spoilers, don't read if you want to complete the game by yourself].
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The game is very very very very good, I love all the liminal spaces. One thing, I've completed the game and gained access to the exploration mode, but I can't find the last 2 rooms, I need help and rest, maybe someone can help me with some tips or hints to find those; the rooms that I need to see to unlock them all are: "Your Jumps Are Annoying", and "Find the code [Backrooms]" (I searched for hours in the game, in the backrooms, but couldn't find any clues, codes... nothing).