itch.io

Let one of the box being pushed through the wall and grab the second one, when you glitch through the wall you will see the box that you don't old next to you but the box you holded disappear, this box is still behind the wall but you still hold it, so walk some distance aways from the wall and the cube should pop in your hand.

Let's speedrun the game in "all cubes" category  

Simple mais très fun ^^