Here's a clear tutorial on how to get to golden cube.
No problem!
the tutorial isnt that clear, it says box jumping but doesnt explain what exactly that is(I was wondering whether it means floating using the box or jumping while floating with the box), also when it says jump at a 45 degree angle it doesnt specify which way the angle goes, and when you can only get through the corner like 10% of the time the small details like that are really required