for the wrench go to the screen where the lazers are and on the floor click on some of the blue tiles around it. you'll find the wrench somewhere under the tiles in that view of the room
oh, go to the far left, then just a lil to the right where you have enough room to jump up, then jump up and to the left to land on the small block a bit above you, jump out to the right, up and then back to the left to get onto the block on top of it then you can figure it out from there
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