Feedback #1:
I have tried your map yesterday and it was easy to found the 2 cubes and to put them on their "button" (sorry I don't how it is called in English, I always play the game in French ), then I put the laser-cube in front the laser 1st laser (on the left of the room, the other laser, on the right, is now connected to its "switch").
But I don't undersdant what is the purpose of the "switch-button" who is on the other side of the exit door (on the top-right of the room, behond the deadly lasers)

Unfortunately I can't upload screenshots here (-T_T-)

If my story isn't understandble, tell me and I will use Google Translation this time

Sorry for bad English and I wish my feedback will help as much as I enjoyed the 1st part this test chamber! (I think this is how it's called in English)

EDIT: Here is the "laser-cube" I was talking about:

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3594158525