you need the up arrow in the hole next the the hallway to the button and the normal block in front of the wall tile
i don't know how to get the normal block their tho?
I put a tip to people playing the game below. I said that when doing a puzzle, if you are stuck, think about what your goal is and ask yourself, "Why?"
In other words; If it is actually* impossible for you to get the normal block into that position, then getting the normal block there is not your goal.
*: There are puzzles later in which something seems impossible, but actually you have to think about the items in the game differently than you had to think before.
Sometimes when something seems impossible, you are not going far enough in the plan to see it through.